Assertion : The colour of old lead paintings can be restored by washing with a dilute solution of `H_2O_2`.
Reason : Hydrogen peroxide oxidises black lead sulphide to white lead sulphate.

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

A