A man pushes a wall and fails to displace it. He does :

$\text{Hint}$: We know work done in displacing the object is equal to the product of the force applied on the object and the distance traveled by it in the direction of force applied. Let us apply this concept to solve the problem.

$\text{Step 1}$:

We know $Workdone(W)=F.S$

This is the work done by the man when he pushes the wall.

Given that man pushes a wall and fails to displace it so displacement is zero i.e.., $S=0$

$\text{Step 2}$:

$Workdone(W)=F.0=0$

So work done is zero.

Thus option (D) is correct.