Assertion: A body is momentarily at rest but no force is acting on it at that time.
Reason: When a force acts on a body, it may not have some acceleration.
Options:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false and R is also false.