Which animals cast off their scales as skin casts?

What type of eggs are found in reptiles and birds?

Which of the following animals can move its upper jaw?

Which among the following has a four-chambered heart?

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.

Snakes have: