Assume body B to be uniform:
Column-A Column-B (Torque of
normal reaction on body B
about centre of mass)
(a)
(F is directed towards|
centre of mass)
(p) Clockwise
(b)
(q) Anticlockwise
(c)
(r) Zero
(s) Conclusion cannot be drawn
with the information given

Moderate

Solution

(a)
To balance torque due to f, N will shift downwards
(For rotational equilibrium ${\vec{τ}}_{f} = - {\vec{τ}}_{N})$ (about C)
(b)
Normal will shift towards left.
(For rotational equilibrium ${\vec{τ}}_{f} = - {\vec{τ}}_{N})$
(c)
Frictionless surface. So, no torque about C.M. So
normal will not shift and will pass through C.M.

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Column-A		Column-B (Torque of normal reaction on body B about centre of mass)
(a)	(F is directed towards\| centre of mass)	(p)	Clockwise
(b)		(q)	Anticlockwise
(c)		(r)	Zero
		(s)	Conclusion cannot be drawn with the information given