Forces of action and reaction act:
simultaneously on different bodies
Explanation of correct option
(D):simultaneously on different bodies
Explanation of incorrect option(s)
(A): one after the other on the same body: Both action and reaction happen simultaneously, but on different bodies, because action and reaction do not have the same effect on the same body.
(B): simultaneously on the same body: The action and reaction will not have the same effect on the same body.
(C): one after the other on different bodies: In nature, both action and reaction occur simultaneously, which indicates that there will be a reaction until the action occurs.
Hence, forces of action and reaction act simultaneously on different bodies. Hence option (d) is correct.