Assertion: There is no cause-effect relation between action and reaction.
Reason: Action and reaction forces are not simultaneous forces.
A) Both assertion and reason are correct and the reason is the correct explanation for the assertion.
B) Both assertion and reason are correct but the reason is not the correct explanation for the assertion.
C) Assertion is correct but reason is incorrect.
D) Both assertion and reason are incorrect.

Hint: The given question is based on Newton’s third law of motion. Newton’s third law of motion holds an important place in physics. The statement of Newton’s third law of motion is every action has an equal and opposite reaction.

Complete step by step solution:
The assertion statement is “There is no cause-effect relation between action and reaction”. this statement is true. According to the third law of motion every acting force has to face an equal and opposite reactive force. The reaction force is not an effect of the acting force and neither the acting force is a cause of the reactive force. The reactive force comes into action as soon as a force is applied there is simply no cause and effect relationship between action and reaction.

The reason statement is ”Action and reaction forces are not simultaneous forces”. This statement is in contradiction to the previous statement. As stated earlier the reactive force comes into action as soon as a force is applied there is simply no cause and effect relationship between action and reaction. The reason to which is the assertion itself i.e there is no cause-effect relationship between action and reaction. Hence, both acting and reacting forces are simultaneous forces.

From the above discussion, it is clear that there is no cause-effect relationship between action and reaction forces and they both are simultaneous forces. This makes our assertion to be correct and reason to be incorrect.

Hence, option C is the correct answer.

Note: We have seen Newton’s third law of motion in the above section. Let us also have a look at the remaining two laws of motion. Newton’s First Law of Motion: Every object remains in the state of rest or of uniform motion in a straight line unless an external force is applied. Newton’s Third Law of Motion: Rate of change of momentum is equal to the force.