Assertion (A): Gandhi stopped the Non-Cooperation Movement in 1922.
Reason (R): Violence at Chauri-Chaura led him to stop the movement.
(a) Both A and R are true but R is the correct explanation of A.
(b) Both A and R are true but R is not a correct explanation of A
(c) A is true but R is false (d) A is false but R is true