All reptiles are

Correct Option: A

Explanation : 

• The tetrapod vertebrae which are reptile, bird, and mammal have a clade called amniotes.

• They are characterized by having the property of laying eggs with an amnio within.

• Reptiles are cold-blooded or poikilotherms.

• Reptiles are Reptiles that have non-glandular skin types.

• It has very dry and scaly skin.

• Sexes are separate.

• fertilization is internal.

Hence, Reptiles are Poikilotherms and Amniotes.