The three groups of mammals are Montremes, Placentals and ..?
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Marsupials
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Amphibians
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Squamata
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Testudines
A
Correct answer
Explanation
The three main groups of mammals are Monotremes (egg-laying mammals like platypus), Marsupials (pouched mammals like kangaroos), and Placentals (mammals with placenta like humans). Marsupials give birth to underdeveloped young that continue developing in the mother's pouch. Amphibians are not mammals, while Squamata and Testudines are reptile suborders.