If a small concrete cube is submerged deep in still water in such a way that the pressure exerted on all faces of the cube is $p,$ then the maximum shear stress developed inside the cube is
(A) 0
(B) $\frac{p}{2}$
(C) $p$
(D) $2 p$
If a small concrete cube is submerged deep in still water in such a way that the pressure exerted on all faces of the cube is $p,$ then the maximum shear stress developed inside the cube is
(A) 0
(B) $\frac{p}{2}$
(C) $p$
(D) $2 p$