A block with a square base measuring a x a, and height h, is placed on an inclined plane. The coefficient of friction is μ. The angle of inclination (θ) of the plane is gradually increased. The block will
(a) topple before sliding if μ > a/h
(b) topple before sliding if μ < a/h
(c) slide before toppling if μ > a/h
(d) slide before toppling if μ < a/h
