The correct answer is: A. Bessemer steel
Bessemer steel is a type of steel that is made by a process called the Bessemer process. The Bessemer process is a steelmaking process that was developed in the 1850s by Henry Bessemer. The process involves blowing air through molten pig iron to remove the impurities. Bessemer steel is a strong and durable steel that is used in a variety of applications, including the manufacture of rails.
Mild steel is a type of steel that is low in carbon content. Mild steel is a relatively soft and ductile steel that is easy to work with. Mild steel is used in a variety of applications, including the manufacture of structural steel, sheet metal, and wire.
Cast steel is a type of steel that is made by casting molten steel into a mold. Cast steel is a strong and durable steel that is used in a variety of applications, including the manufacture of machinery, tools, and engines.
Stainless steel is a type of steel that is resistant to corrosion. Stainless steel is a strong and durable steel that is used in a variety of applications, including the manufacture of kitchen appliances, cutlery, and jewelry.