Assertion (A): For structure steels, I-beams preferred then other shapes.
Reason (R): In I-beams a large portion of their cross-section is located far from the neutral axis
(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