When hard water is evaporated completely the white solid remains in the container. It may be due to the presence of
1. Carbonates of Ca and Mg.
2. Sulphates of Ca and Mg.
3. Chlorides of Ca and Mg.
Select the correct answer

A. 1 and 2

B. 1, 2 and 3

C. Only 3

D. 1 and 3

Answer: Option D