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) $2 p$

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