Deficiency of vitamin B₁ (Thiamine) causes beri beri.

Correct Option: A

Deficiency of vitamin B₁ (Thiamine) causes beri beri.

Vitamin K is also known as ‘antihaemorrhagic factor’. This vitamin is essential for the synthesis of prothrombin in liver cells which is essential for normal blood clotting. It is also synthesized by bacteria present in the colon.

Correct Option: B

Vitamin K is also known as ‘antihaemorrhagic factor’. This vitamin is essential for the synthesis of prothrombin in liver cells which is essential for normal blood clotting. It is also synthesized by bacteria present in the colon.

Vitamin D (ergocalciferol or antirachitic vitamin) which is commonly known as ‘sunshine vitamin’ regulates the absorption of calcium & phosphorus from gastrointestinal tract and hence helping in the normal growth of bones & teeth. Its deficiency disturbs the calcium & phosphorus absorption and hence deficiency of these minerals in the body causes soft bones where bones become curved and fragile (osteomalacia) and teeth decay.

Correct Option: A

Vitamin D (ergocalciferol or antirachitic vitamin) which is commonly known as ‘sunshine vitamin’ regulates the absorption of calcium & phosphorus from gastrointestinal tract and hence helping in the normal growth of bones & teeth. Its deficiency disturbs the calcium & phosphorus absorption and hence deficiency of these minerals in the body causes soft bones where bones become curved and fragile (osteomalacia) and teeth decay.

Pellagra.

Correct Option: C

Pellagra.

The excess of fluorine in water causes a condition called fluorosis, which is identified by mottling of teeth (yellowish streaks) and abnormal bones liable to fracture etc.

Correct Option: C

The excess of fluorine in water causes a condition called fluorosis, which is identified by mottling of teeth (yellowish streaks) and abnormal bones liable to fracture etc.