Assertion (A): A square section is more economical in bending than the circular section of same area of cross – section
Reason (R): The modulus of the square section is less than that of circular section of same area of cross –section
(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 but R is true