The correct answer is: C. Cast iron.
Cast iron is a type of iron that is made by melting iron and then pouring it into a mold. It is a strong and durable material that is often used for pipes and other plumbing fixtures.
R.C.C. stands for reinforced concrete. It is a composite material that is made by combining concrete with steel reinforcement. R.C.C. is a strong and durable material that is often used for structural purposes.
P.C.C. stands for precast concrete. It is a type of concrete that is manufactured in a factory and then transported to the construction site. P.C.C. is a strong and durable material that is often used for foundations and other structural elements.
Glazed stonewares are a type of ceramic that is made by firing clay at a high temperature. They are a strong and durable material that is often used for sinks and other plumbing fixtures.
House connections to the laterals are generally made by cast iron because it is a strong and durable material that is resistant to corrosion. Cast iron is also a relatively inexpensive material, which makes it a cost-effective option for house connections.