Which reptile possesses a four-chambered heart?

Snakes have:

Statement $A$: The name 'Reptilia' is derived from the Latin word 'repere' or 'reptum',which means 'to creep' or 'to crawl'.
Statement $B$: Since they creep or crawl,it is not necessary that all animals of the class Reptilia are limbless.

Reptiles share which of the following characteristics with birds and mammals?

In suborder $Ophidia$,the vertebrae are:

In which of the following animals do sperm remain viable for a long period inside the female body?