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A thin convex lens made from crown glass...

A thin convex lens made from crown glass `(mu = 3//2)` has focal length `f`. When it is measured in two different liquids having refractive indiced `4//3` and `5//3`, it has the focal length `f_(1)` and `f_(2)` respectively. The correct ralation between the focal lengths is

A

`f_(2) gt f` and `f_(1)` the focal length is :

B

`f_(1)` and `f_(2)` both become negative

C

`f_(1) = f_(2) gt f`

D

`f_(1) gt f` and `f_(2)` becomes negative

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