In these question, a statement of assertion followed by a statement of reason is given .Choose the correct answer out of the following choices:
Assertion and reason both are correct statements and reason is correct explanation for assertion.
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
Assertion is correct statement but reason is wrong statement.
Assertion is wrong statement but reason is correct statement.
Assertion: A concave and convex lens both have the same focal length in air. When they both have the same focal length in air. When they are submerged in water they will have the same focal length.
Reason: The refractive index of water is smaller than the refractive index of air.

Options

A. A
B. B
C. C
D. D