Gravitation

The weights of an object are measured in a coal mine of depth ' $h_1$ ', then at sea level of height ' $h_2$ ' and lastly at the top of a mountain of height ' $h_3$ ' as $W_1, W_2$ and $W_3$ respectively. Which one of the following relation is correct?
[h $h_1 \ll R, h_3 \gg h_2=R, R=$ radius of the earth ]