Prothrombin (factor II) is a vitamin K–dependent coagulation factor. On activation, prothrombin is proteolytically cleaved to form thrombin, and in turn acts as a serine protease that converts fibrinogen to fibrin. In addition, thrombin catalyzes many other coagulation-related reactions.
Vitamin K
Its plays a major role in helping the blood clot, preventing excessive bleeding. Unlike many other vitamins, vitamin K is not typically used as a dietary supplement. Vitamin K is actually a group of compounds. The most important of these compounds appears to be vitamin K1 and vitamin K2.
Vitamin A takes part in the formation of visual retinal pigments like rhodopsin, iodopsin etc. and thus, it is required for normal vision.
Vitamin D regulates the metabolism of calcium and phosphorus and in turn affects the growth of body by affecting the growth of bone and teeth.
Vitamin K is necessary for the formation of prothrombin (important component of blood clotting mechanism) in the liver of human beings and thus, it is involved in clotting of blood.
Vishu Choudhary
Prothrombin (factor II) is a vitamin K–dependent coagulation factor. On activation, prothrombin is proteolytically cleaved to form thrombin, and in turn acts as a serine protease that converts fibrinogen to fibrin. In addition, thrombin catalyzes many other coagulation-related reactions.
So vitamin K is correct answer.
Vikas Pandey
Vitamin K
Its plays a major role in helping the blood clot, preventing excessive bleeding. Unlike many other vitamins, vitamin K is not typically used as a dietary supplement. Vitamin K is actually a group of compounds. The most important of these compounds appears to be vitamin K1 and vitamin K2.
Vinit Rajput
So, the correct answer is ‘Vitamin K’. (Option-3)