Imagine earth to be a solid sphere of mass M and radius R. If the value of acceleration due to gravity at a depth ‘d’ below earth’s surface is same as its value at a height ‘h’ above its surface and equal to g 4 (where g is the value of acceleration due to gravity on the surface of earth), the ratio of h d will be :

1. A. 1
2. B. 4 3
3. C. 3 2
4. D. 2 3

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