In a loaded beam, the point of contraflexure occurs at a section where
(A) Bending moment is minimum
(B) Bending moment is zero or changes sign
(C) Bending moment is maximum
(D) Shearing force is maximum
(A) Bending moment is minimum
(B) Bending moment is zero or changes sign
(C) Bending moment is maximum
(D) Shearing force is maximum