Two identical balls, of equal masses A and B are lying on a smooth surface as shown in fig. Ball A hits ball B (which is at rest) with a velocity v = 16 m/s. What should be the minimum value of coefficient of restitution between A ad B so that B just reaches the highest point of inclined plane.
(a) 2 / 3
(b) 1 / 4
(c) 1 / 2
(d) 1 / 3