Water is said to be temporarily hard when it contains?

A. Ca (HCO3)2 and Mg (HCO3)2 salts
B. Ca (HCO3)2 and CaCO3 salts
C. Mg(HCO3)2 and CaSO4 salts
D. CaSO4 and Ca(HCO3)2 salts

Correct Answer:

Option A – Ca(HCO3)2 and Mg(HCO3)2 salts