Correct option is B
Carburizing is a surface hardening process in which carbon content is increased on the surface of low-carbon steel by exposing it to a carbon-rich environment at high temperatures.
· This process improves wear resistance and hardness while maintaining a tough core.
· Commonly used in gears, camshafts, and bearings to enhance surface durability.
· It is performed using solid, liquid, or gaseous carbon sources.
