Which of the following is commonly known as Quicklime?

Correct option is D

Quicklime is a chemical compound that is also known as burnt lime or calcium oxide (CaO). Quicklime is a white or grayish-white powder that is highly reactive and can be used for a variety of purposes, including in the production of cement, paper, and steel. It is also used in the treatment of water and wastewater, as well as in agriculture to reduce soil acidity.
The other compounds mentioned in the options are:
CaSO₄: Calcium sulfate, which is commonly known as gypsum.
CaCl₂: Calcium chloride, which is a salt that is commonly used for de-icing roads and as a food additive.
Ca(OH)₂: Calcium hydroxide, which is commonly known as slaked lime or hydrated lime and is used in a variety of applications, including in construction, agriculture, and water treatment.