Which of the following organisms is not a primate?

Assertion $(A)$: Cold-blooded animals do not have a fat layer.
Reason $(R)$: Cold-blooded animals use their fat for metabolic processes during hibernation.

Double vagina are found in

Among the following,which one lays eggs and does not produce young ones directly?

Assertion : The duck-billed Platypus and the spiny ant-eater,both are egg-laying animals yet they are grouped under mammals.
Reason : Both of them have seven cervical vertebrae and $12$ pairs of cranial nerves.

Which of the following are viviparous animals?