Scientific name of king cobra is

The Gila monster, $Heloderma$, occurs in:

What is specific in the heart of crocodiles among reptiles?

The largest venomous snake is .....

The type of vertebrae in sub-order $Ophidia$ is

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.