Assertion : Transition metals show variable valency.
Reason : Transition metals have a large energy difference between the `ns^2` and (n-1)d electrons.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of(A).
B. If both (A) and (R) are correct, but(R) is not the correct explanation of (A).
C. If(A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

C

Explanation

Actually transition metals show variable valency due to very small difference between the `ns^2` and (n-1) d electrons.