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

The study of reptiles is known as:

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.

Which of the following statements is correct regarding Indian snakes?

Which of the following animals can move its upper jaw?

All types of snakes are included in which order?