Which among the following is a living fossil?

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.

$A$ $Diapsid$ skull is found in which of the following groups?

Which of the following snakes is non-poisonous?

Choose the kind of erythrocyte found in Reptiles.

Organisms that possess dry and cornified skin belong to which class?