If `W_1, W_2 and W_3` are the work done in moving a particle from A and B along three different paths 1, 2 and 3 respectively (as shown) in the gravitational field of a point mass `m`, the relation between `W_1, W_2 and W_3` is
Options:
(a) `W_1 > W_2 > W_3`
(b) `W_1 = W_2 = W_3`
(c) `W_1 < W_2 < W_3`
(d) `W_2 > W_1 > W_3`