Carbon steel is

A. Made by adding carbon in steel

B. Refined from cast iron

C. An alloy of iron and carbon with varying quantities of phosphorus and sulphur

D. Extensively used for making cutting tools

Answer: Option C

Solution(By Examveda Team)

Most-common type of steel that contains about 0.1 to 0.3 percent carbon.
In general, increase in the amount of carbon reduces ductility but increases tensile strength and the ability to harden through tempering.
As an industry-wide practice, steel that does not contain any specified or standard amount of one or more alloying elements (such as chromium, molybdenum, nickel, titanium, vanadium) to be classified as alloy steel is called carbon steel