The correct option is: (A)
Explanation:
Bleaching powder or calcium hypochlorite is a chemical compound with formula Ca(ClO)2.
The chemical formula for marble is CaCO3. It is calcium carbonate. Marble is used in various applications, including home design.
Gypsum is a very soft sulphate mineral composed of calcium sulphate dihydrate, with the chemical formula CaSO4 · 2H2O. It can be used as a fertilizer, is the main constituent in many forms of plaster and is widely mined.
