Assertion : Solids having more F-centres possess intense colours.
Reason : Excess of `Na^(+)` in NaCl solid having F-centres makes it appear to pink.

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

Excess `Na^(+)` in NaCl solid at `F^(-)` centres develops yellow colour.