Discussion
Which one among the following vitamins is necessary for blood clotting ?
Answer: C
The vitamin necessary for blood clotting is vitamin K.
The liver needs vitamin K to make several clotting factors, including prothrombin (factor II) and factors VII, IX and X. Without enough of it, blood takes much longer to clot and bleeding becomes hard to stop. The K comes from Koagulation, the German word for clotting.
Vitamin A is needed for vision, vitamin D for calcium absorption and bone health, and vitamin C for collagen formation and wound healing; none of them is a clotting factor.
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