Assertion (A) : Synthetic detergents can lather wen in hard water.Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water.

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

Answer: (B)