Assertion (A): In a simply supported beam carrying a concentrated load at the mid- span both the shear force and bending
Reason (R): When the shear force at any section of a beam is either zero or changes sign the bending moment at that section is maximum
(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