Which one of the following vitamins has a role in blood clotting ?

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Which one of the following vitamins has a role in blood clotting ?

Vitamin A
Vitamin B
Vitamin D
Vitamin K
This question was previously asked in
UPSC CDS-1 – 2016
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Vitamin K plays a crucial role in blood clotting (coagulation). It is essential for the synthesis of several clotting factors (proteins) in the liver, including factor II (prothrombin), VII, IX, and X, as well as protein C and protein S. These factors are involved in the cascade of reactions that lead to the formation of a blood clot.
Vitamin K is necessary for the synthesis of proteins involved in the blood clotting process.
Vitamin A is important for vision, immune function, and cell growth. Vitamin B vitamins (a group) are involved in various metabolic processes, energy production, and nerve function. Vitamin D is essential for calcium absorption, bone health, and immune function.

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