Granite is not suitable for ordinary building purpose because A. It can not be polished B. It is not a fire proof material C. It is costly D. It has less crushing strength

It can not be polished
It is not a fire proof material
It is costly
It has less crushing strength

The correct answer is: C. It is costly.

Granite is a type of igneous rock that is formed when magma or lava cools and solidifies. It is one of the most popular types of stone used for building and construction, due to its strength, durability, and beauty. However, granite is also one of the most expensive types of stone, which can make it unsuitable for some building purposes.

Other options:

  • Option A is incorrect. Granite can be polished to a high shine, which makes it a popular choice for countertops, floors, and other surfaces.
  • Option B is incorrect. Granite is a fireproof material, which makes it a good choice for fireplace surrounds and other applications where fire resistance is important.
  • Option D is incorrect. Granite has a high crushing strength, which makes it a strong and durable material.