Assertion: In realistic situation, the `x-t, y-t and a-t` graphs will be smooth.
Reason: Physically acceleration and velocity cannot change values abruptly at an instant.
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.