The change in the value of g at a height...

The change in the value of `g` at a height `h` above the surface of the earth is the same as at a depth d below the surface of earth. When both `d` and `h` are much smaller than the radius of earth, then which one of the following is correct?

A

`d=(3h)/2`

B

`d=(h)/2`

C

`d=h`

D

`d=2 h`

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