40% D. 21%" class="read-more button" href="https://exam.pscnotes.com/mcq/the-percentage-of-oxygen-present-in-air-is-approximately-a-44-b-23-c-40-d-21/#more-21720">Detailed SolutionThe percentage of oxygen present in air is approximately- A. 44% B. 23% C. 40% D. 21%
Kelvin D. All of these" class="read-more button" href="https://exam.pscnotes.com/mcq/which-is-the-absolute-temperature-scale-a-celsius-b-fahrenheit-c-kelvin-d-all-of-these/#more-21718">Detailed SolutionWhich is the absolute temperature scale? A. Celsius B. Fahrenheit C. Kelvin D. All of these
C. Troposphere D. Magnetosphere" class="read-more button" href="https://exam.pscnotes.com/mcq/which-layer-protects-earth-from-harmful-rays-of-the-sun-a-ionosphere-b-ozone-layer-c-troposphere-d-magnetosphere/#more-21717">Detailed SolutionWhich layer protects earth from harmful rays of the Sun? A. Ionosphere B. Ozone layer C. Troposphere D. Magnetosphere
Sarva Shiksha Abhiyan D. Ayush" class="read-more button" href="https://exam.pscnotes.com/mcq/which-of-the-following-schemes-is-launched-for-the-school-going-children-a-lok-jumbish-b-mid-day-meal-c-sarva-shiksha-abhiyan-d-ayush/#more-21715">Detailed SolutionWhich of the following schemes is launched for the school going children: A. Lok Jumbish B. Mid day meal C. Sarva Shiksha Abhiyan D. Ayush
Decimal" class="read-more button" href="https://exam.pscnotes.com/mcq/noise-or-noise-pollution-measured-in-a-phon-b-deci-c-decibel-d-decimal/#more-21716">Detailed SolutionNoise or Noise pollution measured in: A. Phon B. Deci C. Decibel D. Decimal
href="https://exam.pscnotes.com/mcq/aids-is-caused-by-a-bacteria-b-fungus-c-helminth-d-virus/#more-21714">Detailed SolutionAIDS is caused by: A. Bacteria B. Fungus C. Helminth D. Virus