Correct option is D
Characteristics of Good Bricks:
Bricks should be uniform, in size and shape. They should be sound and compact.
They should be free from cracks and other flaws such as air bubbles, stone nodules, etc. with sharp and square edges.
Bricks should not absorb more than 15% to 20% of their own dry weight of weight of water when immersed in water for 24 hours .
The compressive strength of bricks should be in the range of (15 to 35 MPa).
The brick should not change in volume when wet.
Bricks should neither over burnt nor under-brunt.
The thermal conductivity of bricks should be low, as it is desirable that the building built with them should be cool in summer and warm in winter.
Bricks should be soundproof.
Bricks should be non-inflammable and incombustible.
Bricks should be free from lime pitting.
Brick should be durable.
