Which of the following is a non-poisonous snake?

What is present as an exoskeleton in the animals of the class $Reptilia$?

Animals that crawl on their bellies are known as:

The type of dentition in $Crocodile$ is

Which of the following is the most advanced feature found in crocodiles and related animals?

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.