Which of the following is not a snake?

The zoological name of the common Indian Krait is:

Wall lizard can run efficiently on vertical surfaces because of

The characteristics of Class $Reptilia$ are:

Reptiles are$-$

$A$: The tortoise is classified under the class $Reptilia$.
$R$: The tortoise is a triploblastic,poikilothermic animal with epidermal scales.