A) Birds: lay eggs, mammals: give birth to young ones and reptiles: give birth to young ones.
B) Birds: lay eggs, mammals: give birth to young ones and reptiles: lay eggs.
C) Birds: give birth to young ones, mammals: lay eggs and reptiles: lay eggs
D) Birds: give birth to young ones, mammals: lay eggs and reptiles: give birth to young ones
E) None of these
Correct Answer: B
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