A) Neck
B) Diaphragm
C) Optic lobes of brain
D) Tail
Correct Answer: B
Solution :
Presence of diaphragm is the characteristic feature of mammals. It is highly muscular and fibrous partition elevated toward thorax, like a dome except some of its central part which is depressed due to pressure of the heart. Neck is short and follows head. It is found in invertebrates and vertebrates both. Optic lobes are part of mid brain. These are one pair in frog while two pairs in rabbit.
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