Scurvy is a disease with bleeding gums, thin bones etc. It is caused due to the deficiency of vitamin C. It can be cured by taking citrus fruits.

Correct Option: C

Scurvy is a disease with bleeding gums, thin bones etc. It is caused due to the deficiency of vitamin C. It can be cured by taking citrus fruits.

Beri-beri is a deficiency disease caused by the lack of vitamin B₁ (Thiamine) in the diet. The deficiency of riboflavin (vitamin B₂) causes ariboflavinosis. Scurvy is the result of lack of vitamin C in the diet. Deficiency of calciferol (vitamin D) in the diet causes rickets in children and osteomalacia in adults.

Correct Option: C

Beri-beri is a deficiency disease caused by the lack of vitamin B₁ (Thiamine) in the diet. The deficiency of riboflavin (vitamin B₂) causes ariboflavinosis. Scurvy is the result of lack of vitamin C in the diet. Deficiency of calciferol (vitamin D) in the diet causes rickets in children and osteomalacia in adults.

Nightblindness is caused by deficiency of vitamin A. Cirrhosis is caused by inflammation of liver cells.

Correct Option: C

Nightblindness is caused by deficiency of vitamin A. Cirrhosis is caused by inflammation of liver cells.

Vitamin A takes parts in synthesis of retinal pigments. Vitamin C functions as antioxidant. Vitamin D is required for the absorption of calcium in the intestine.

Correct Option: B

Vitamin A takes parts in synthesis of retinal pigments. Vitamin C functions as antioxidant. Vitamin D is required for the absorption of calcium in the intestine.

Hepatic portal system brings venous blood directly from digestive tract, spleen, pancreas and gall bladder to liver for extraction of nutrients and other metabolites by the hepatic portal vein. Aorta arises from the left ventricle and carries oxygenated blood to all parts of the body. Posterior vena cava opens into the right atrium bringing deoxygenated blood from the lower half of the body.

Correct Option: A

Hepatic portal system brings venous blood directly from digestive tract, spleen, pancreas and gall bladder to liver for extraction of nutrients and other metabolites by the hepatic portal vein. Aorta arises from the left ventricle and carries oxygenated blood to all parts of the body. Posterior vena cava opens into the right atrium bringing deoxygenated blood from the lower half of the body.