A body of $$m$$ kg slides from rest along the curve of vertical circle from point $$A$$ to $$B$$ in friction less path. The velocity of the body at $$B$$ is: (given, $$R = 14$$ m, $$g = 10$$ m/s$$^2$$ and $$\sqrt{2} = 1.4$$)

A

$$16.7$$ m/s

B

$$19.8$$ m/s

C

$$10.6$$ m/s

D

$$21.9$$ m/s