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A convex lens of refractive index n beha...

A convex lens of refractive index `n` behaves as a convex lens of smaller power in a liquid of refractive index `n_1` and as a concave lens in another liquid of refractive index `n_2`. Then relation between `n, n_1` and `n_2` is

A

`ngtn_1gtn_2`

B

`n_2gtngtn_1`

C

`n_1ltnltn_2`

D

`n=n_1=n_2`.

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