Assertion (a): all teaching implies learning, reason (r) learning to be useful must be derived from teaching. choose the correct answer from the following: (1)

Assertion (A): All teaching implies learning, Reason (R) Learning to be useful must be derived from teaching. Choose the correct answer from the following: (1) Both (A) and (R) are true but (R) is not the correct explanation of (A). (2) (A) is true, but (R) is false. (3) (A) is false, but (R) is true. Both (A) and (R) are true and (R) is the correct explanation of (A). (4)