The correct option is A Cornified cells
The moulting is snakes is when they shed their skin. This is achieved by the snake rubbing its head against a hard object, such as a rock or piece of wood, causing the already stretched skin to split.
At this point, the snake continues to rub its skin on objects, causing the end nearest the head to peel back on itself, until the snake is able to crawl outs of its skin, effectively turning the moulted skin inside-out. This is moulting or ecdysis of cornified cells of the skin.
So, the correct answer is option A.