Correct option is A
Cast iron is a widely used material known for its excellent strength, wear resistance, and machinability. It is primarily used in the construction of pipes, automotive components, and machinery.
Important Points:
· Cast iron is an alloy of iron, carbon, and silicon.
· Types of cast iron include gray cast iron, ductile iron, and white cast iron.
· Copper, nickel, and aluminum are metals but not as commonly associated with the term "cast materials."
