The correct answer is (a) Nepal. Nepal is called “Land of Thunderbolt” because it is home to Mount Everest, the highest mountain in the world. The name “Nepal” comes from the Sanskrit words “nep” meaning “snow” and “ala” meaning “home”.
(b) Sri Lanka is called “The Emerald Isle of the East” because of its lush green vegetation. The name “Sri Lanka” comes from the Sanskrit words “sri” meaning “beautiful” and “lanka” meaning “island”.
(c) Bangladesh is called “The Land of the Golden Pagoda” because of its many Buddhist temples. The name “Bangladesh” comes from the Bengali words “bangla” meaning “Bengal” and “desh” meaning “country”.
(d) Bhutan is called “The Land of the Thunder Dragon” because of its national animal, the thunder dragon. The name “Bhutan” comes from the Tibetan words “bhutan” meaning “high land” and “po” meaning “people”.