Assertion A : Paints with white lead base are not recommended for painting of iron works.Reason R : Paints with white lead base do not check rusting of iron.Select your answer according to the coding system given below:

• A. oth A and R is true and, R is the correct explanation of A
• B. oth A and R is true but R is not the correct explanation of A
• C. is true but R is false
• D. is false but R is true