Directions: The following items consists of two statements; one labeled as ‘statement (I)’ and the other as ‘Statement (II)’. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Codes:
(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 a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Assertion (A): Refining the grain size of polycrystal line material renders it harder and stronger.
Reason (R): Grain boundaries provide easy paths to dislocation motion.