What is the organ where most of the clotting factors are produced? What is the role of vitamin K in the blood coagulation?

What is the organ where most of the clotting factors are produced? What is the role of vitamin K in the blood coagulation?
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Most of the clotting factors are produced in the liver. Vitamin K participates in the activation of several clotting factors and it is fundamental for the well-functioning of the blood coagulation.
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Vitamin K regulates the synthesis of blood clotting factors. (A) VII (B) IX (C) X (D) All of these

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Vitamin K is involved in posttranslational modification of the blood clotting factors by acting as cofactor for the enzyme: (A) Carboxylase (B) Decarboxylase (C) Hydroxylase (D) Oxidase

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