{"id":88018,"date":"2025-06-01T06:59:45","date_gmt":"2025-06-01T06:59:45","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88018"},"modified":"2025-06-01T06:59:45","modified_gmt":"2025-06-01T06:59:45","slug":"which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/","title":{"rendered":"Which one of the following is found in the innermost part of the Earth"},"content":{"rendered":"

Which one of the following is found in the innermost part of the Earth ?<\/p>\n

[amp_mcq option1=”Conrad discontinuity” option2=”Moho discontinuity” option3=”Guttenberg discontinuity” option4=”Lehmann discontinuity” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2023<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is D) Lehmann discontinuity.
\n<\/section>\n
\nThe Earth is structured in layers: crust, mantle, outer core, and inner core. Discontinuities are boundaries where seismic waves change speed due to changes in material properties. The Lehmann discontinuity is located at a depth of approximately 5150 km and separates the liquid outer core from the solid inner core. Since the inner core is the innermost part of the Earth, the Lehmann discontinuity is found at the boundary of this innermost region.
\n<\/section>\n
\n– The Conrad discontinuity is a theoretical or regional boundary within the continental crust.
\n– The Moho discontinuity (Mohorovi\u010di\u0107 discontinuity) is the boundary between the Earth’s crust and the mantle (around 35-70 km under continents, 5-10 km under oceans).
\n– The Guttenberg discontinuity (also known as the Wiechert\u2013Gutenberg discontinuity or Core\u2013mantle boundary) is the boundary between the Earth’s mantle and the outer core (around 2900 km depth).
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is found in the innermost part of the Earth ? [amp_mcq option1=”Conrad discontinuity” option2=”Moho discontinuity” option3=”Guttenberg discontinuity” option4=”Lehmann discontinuity” correct=”option4″] This question was previously asked in UPSC NDA-1 – 2023 Download PDFAttempt Online The correct answer is D) Lehmann discontinuity. The Earth is structured in layers: crust, mantle, outer core, … <\/p>\n

Detailed SolutionWhich one of the following is found in the innermost part of the Earth<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1093],"tags":[1105,1144,1106],"class_list":["post-88018","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1105","tag-rocks-and-earth-sciences","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is found in the innermost part of the Earth<\/title>\n<meta name=\"description\" content=\"The correct answer is D) Lehmann discontinuity. The Earth is structured in layers: crust, mantle, outer core, and inner core. Discontinuities are boundaries where seismic waves change speed due to changes in material properties. The Lehmann discontinuity is located at a depth of approximately 5150 km and separates the liquid outer core from the solid inner core. Since the inner core is the innermost part of the Earth, the Lehmann discontinuity is found at the boundary of this innermost region.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following is found in the innermost part of the Earth\" \/>\n<meta property=\"og:description\" content=\"The correct answer is D) Lehmann discontinuity. The Earth is structured in layers: crust, mantle, outer core, and inner core. Discontinuities are boundaries where seismic waves change speed due to changes in material properties. The Lehmann discontinuity is located at a depth of approximately 5150 km and separates the liquid outer core from the solid inner core. Since the inner core is the innermost part of the Earth, the Lehmann discontinuity is found at the boundary of this innermost region.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:59:45+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which one of the following is found in the innermost part of the Earth","description":"The correct answer is D) Lehmann discontinuity. The Earth is structured in layers: crust, mantle, outer core, and inner core. Discontinuities are boundaries where seismic waves change speed due to changes in material properties. The Lehmann discontinuity is located at a depth of approximately 5150 km and separates the liquid outer core from the solid inner core. Since the inner core is the innermost part of the Earth, the Lehmann discontinuity is found at the boundary of this innermost region.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following is found in the innermost part of the Earth","og_description":"The correct answer is D) Lehmann discontinuity. The Earth is structured in layers: crust, mantle, outer core, and inner core. Discontinuities are boundaries where seismic waves change speed due to changes in material properties. The Lehmann discontinuity is located at a depth of approximately 5150 km and separates the liquid outer core from the solid inner core. Since the inner core is the innermost part of the Earth, the Lehmann discontinuity is found at the boundary of this innermost region.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:59:45+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/","name":"Which one of the following is found in the innermost part of the Earth","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:59:45+00:00","dateModified":"2025-06-01T06:59:45+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is D) Lehmann discontinuity. The Earth is structured in layers: crust, mantle, outer core, and inner core. Discontinuities are boundaries where seismic waves change speed due to changes in material properties. The Lehmann discontinuity is located at a depth of approximately 5150 km and separates the liquid outer core from the solid inner core. Since the inner core is the innermost part of the Earth, the Lehmann discontinuity is found at the boundary of this innermost region.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-found-in-the-innermost-part-of-the-earth\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-1\/"},{"@type":"ListItem","position":3,"name":"Which one of the following is found in the innermost part of the Earth"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88018","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=88018"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88018\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=88018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=88018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=88018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}