Mass M is uniformly distributed only on curved surface of a thin hemispherical shell. A, B and C are three points on the circular base of hemisphere, such that A is the centre. Let the gravitational potential at poins A, B and C be `V_(A), V_(B), V_(C)` respectively. Then :
A. `V_(A)gtV_(B)gtV_(c)`
B. `V_(c)gtV_(B)gtV_(A)`
C. `V_(B)gtV_(A)` and `V_(B)gtV_(C)`
D. `V_(A)=V_(B)=V_(C)`