Q. Synthetic detergents are 1.sodium salts of fatty acids 2.able to produce lather freely with hard water 3.calcium salts of fatty acids 4.a mixture of sodium slats of aromatic and aliphatic sulphonic acids. The correct statements are:

• A. 1 and 4
• B. 1 and 2
• C. 3 and 4
• D. 2 and 4

Correct Answer: D