Assertion : When a convex lens `(mu_(g) = 3//2)` of focal length f is dipped in water, its focal length become `(4)/(3)f`
Reason : The focal length of convex lens in water becomes 4f.

Options

A. Assertion is correct, reason is correct, reason is a correct explanation for assertion.
B. Assertion is correct, reason is correct, reason is not a correct explanation for assertion
C. Assertion is correct, reason is incorrect
D. Assertion is incorrect, reason is correct

Answer

D

Explanation

`f_(w) = f(""_(a)mu_(g) -1)/(((""_(a)mu_(g))/(""_(a)mu_(g))-1)) = f.(((3)/(2)-1))/(((3//2)/(4//3)-1))=4f`