Correct Answer - A
For downward journey : `v^(2) = u^(2) + 2gh`
Therefore, the velocity will increase in downward (negative) direction. The shape of graph will be parabolic. For upward journey : `v^(2) = u^(2) - 2gh`
therefore, the velocity of the ball will become zero at the highest point. Again, the graph will be parabolic.
option (a) is correct