The correct option is
A Spiny anteater
- Egg-laying mammals are known as monotremes.
- They are named so because of the presence of a single cloacal opening in their bodies that serves as a passage for eggs or sperms, feces, and urine.
- As suggested by egg-laying mammal facts, only five species of monotremes are extant, i.e. Duck-billed Platypus and the remaining four belong to the Echidna family. For example- Spiny anteater.
- Whales and bats are viviparous mammals.
So, the correct answer is option A.