Question

{"given":"The question asks to identify an egg-laying mammal from the given options.","key_observation":"Egg-laying mammals, also known as monotremes, are primitive mammals that lay eggs instead of giving birth to live young. They belong to the subclass Prototheria.","option_analysis":[{"label":"(A)","text":"Kangaroo","verdict":"incorrect","explanation":"Kangaroo is a marsupial mammal that gives birth to live, underdeveloped young, which then develop further in a pouch."},{"label":"(B)","text":"Platypus","verdict":"correct","explanation":"The platypus (Ornithorhynchus anatinus) is a well-known example of an egg-laying mammal (monotreme), found in Australia and New Zealand."},{"label":"(C)","text":"Koala","verdict":"incorrect","explanation":"Koala is a marsupial mammal, similar to kangaroos, and gives birth to live young that mature in a pouch."},{"label":"(D)","text":"Whale","verdict":"incorrect","explanation":"Whale is a placental mammal that gives birth to live young and nurses them."}],"answer":"B","formula_steps":[]}