The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.

Correct Option: C

The common is a viral infectious disease of the upper respiratory tract which affects primarily the nose. Over 200 viruses are implicated in the cause of the common cold; the rhinoviruses are the most common.

Strontium-90 is a radioactive isotope of strontium produced by nuclear fission. Used mostly in weapons and nuclear power plants, poisoning usually occurs through accidental ingestion. Studies have also linked strontium-90 to various forms of skin cancer in cases where the radiation was absorbed through the skin.

Correct Option: B

Strontium-90 is a radioactive isotope of strontium produced by nuclear fission. Used mostly in weapons and nuclear power plants, poisoning usually occurs through accidental ingestion. Studies have also linked strontium-90 to various forms of skin cancer in cases where the radiation was absorbed through the skin.

Technically, the largest organ 'in' the body is the liver. Liver is also the heaviest organ, with an average of 1.6 kilograms (3.5 pounds). The largest organ 'of' the body is the skin (the skin is 'outside' the body).

Correct Option: C

Technically, the largest organ 'in' the body is the liver. Liver is also the heaviest organ, with an average of 1.6 kilograms (3.5 pounds). The largest organ 'of' the body is the skin (the skin is 'outside' the body).

Vitamin C, also known as ascorbic acid, is a watersoluble vitamin. Unlike most mammals and other animals, humans do not have the ability to make their own vitamin C. Therefore, we must obtain vitamin C through our diet.

Correct Option: B

Vitamin C, also known as ascorbic acid, is a watersoluble vitamin. Unlike most mammals and other animals, humans do not have the ability to make their own vitamin C. Therefore, we must obtain vitamin C through our diet.

Bile is a bitter-tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine.

Correct Option: B

Bile is a bitter-tasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine.