Comment on the statement 'the sum of action and reaction on a body is zero'.

[Hint: The statement is wrong]

The statement 'the sum of action and reaction on a body is zero' is wrong.

As per the Newton's third law of motion —

In an interaction of two bodies A and B, the magnitude of reaction (i.e., the force F_AB applied by the body A) is equal in magnitude to the action (i.e., the force F_BA applied by the body A on the body B), but they are in directions opposite to each other.

Hence, the two forces can't add up to zero.