A boy of mass 50 kg standing on ground exerts a force of 500 N on the ground. The force exerted by the ground on the boy will be:
(a) 50 N
(b) 25000 N
(c) 10 N
(d) 500 N

According to Newton's third law of motion, For every action, there is an equal and opposite reaction.

Here, the boy exerts a force of 500 N on the ground. So in reaction, the ground will also exert a 500 N of force on the boy in opposite direction.

So, option (d) is correct.