A 50 cm diameter spherical vessel is completely filled up with a liquid of specific gravity 0.8; the vessel and the liquid are then rotated about the vertical axis, without relative motion, at a rotational speed of 20 rad/s. The points of maximum pressure lie on a horizontal plane below the centre of sphere by
(A) 12.5 cm (B) 6.96 cm
(C) 2.45 cm (D) 1.96 cm