| (i) Muscular diaphragm is present in mammals. |
| (ii) Homeothermy is exclusively present in mammals. |
| (iii) Heart is four-chambered with two auricles and two ventricles. |
| (iv) Mammals can be both oviparous and viviparous |
A) Only I
B) Only IV
C) II and III
D) Only III
Correct Answer: A
Solution :
Muscular diaphragm is exclusively present in mammals. It separates thoracic and abdominal cavities.
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