Softer variety of steel may be obtained by A. Cementation process B. Crucible process C. Bessemer process D. Open hearth process

The cementation process can be used to produce a variety of steels, with different properties depending on the amount of carbon that is added. Softer varieties of steel can be obtained by using a lower concentration of carbon.

The other options are incorrect because they are all methods of manufacturing steel that produce a harder and stronger product.

• The crucible process is a method of melting iron and steel in a crucible, which is a container made of a material that can withstand high temperatures. The molten metal is then poured into molds to create ingots or castings.
• The Bessemer process is a method of manufacturing steel by blowing air through molten pig iron. This removes the impurities from the iron and produces a high-quality steel.
• The open hearth process is a method of manufacturing steel by heating pig iron and scrap iron in a furnace with a large open hearth. The impurities from the iron are removed by oxidation, and the molten metal is then poured into molds to create ingots or castings.