A ball is released from rest from point $$P$$ of a smooth semi-spherical vessel as shown in figure. The ratio of the centripetal force and normal reaction on the ball at point $$Q$$ is $$A$$ while angular position of point $$Q$$ is $$\alpha$$ with respect to point $$P$$. Which of the following graphs represent the correct relation between $$A$$ and $$\alpha$$ when ball goes from $$Q$$ to $$R$$?

A

B

C

D