EVERYDAY SCIENCE

Detailed explanation-1: -Serum, sometimes mistakenly considered synonymous with plasma, consists of plasma without fibrinogen. Plasma contains 91% to 92% of water and 8% to 9% of solids.

Detailed explanation-2: -Serum is the blood plasma from which fibrinogen has been removed.

Detailed explanation-3: -Serum is the liquid that remains after the blood has clotted. Plasma is the liquid that remains when clotting is prevented with the addition of an anticoagulant. This is not an insignificant difference.

Detailed explanation-4: -The clot is removed by centrifugation and the resulting supernatant, designated serum, is carefully removed using a Pasteur pipette. Plasma is produced when whole blood is collected in tubes that are treated with an anticoagulant. The blood does not clot in the plasma tube. The cells are removed by centrifugation.

Detailed explanation-5: -Fibrinogen is a blood clotting factor and is absent in serum. The serum is basically blood plasma excluding clotting factors. Hence, option (B) is the correct answer.