A man standing on a boat in still water. If he walks towards the shore the boat will

The correct option is A

move away from the shore

Explanation of correct option

(A): move away from the shore

1. This is because a man needs a response force to step out of a boat, which he does by exerting a force on the boat.
2. As a result, the boat will move away from the shore.

Explanation of incorrect option:

(B): remain stationary: There is always an equal and opposite reaction for every action.

(C): move towards the shore: The force exerted on a man, and a boat is opposite in direction

(D): sink: Due to upthrust boat will not sink

Hence, a man standing on a boat in still water. If he walks towards the shore, the boat will move away from the shore. Hence option (a) is correct.