Multiple choice

During the process of blood coagulation, vitamin K helps in

  1. the conversion of prothrombin to thrombin

  2. the conversion of fibrinogen to fibrin

  3. the formation of thromboplastin

  4. the formation of prothrombin
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D Correct answer
Explanation

Vitamin K is essential for the synthesis of prothrombin (factor II) and other clotting factors in the liver. It doesn't convert prothrombin to thrombin (A - thrombin does that), convert fibrinogen to fibrin (B - thrombin does that), or form thromboplastin (C - this comes from damaged tissues/platelets).

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