The production or release of certain coagulation factors is stimulated by which Vitamin?

Correct option is D

Sol. Vitamin K is essential for the synthesis of clotting factors II, VII, IX, and X in the liver, which are required for normal blood coagulation. Its deficiency can lead to increased bleeding tendency. It is especially important in newborns, hence they are given a vitamin K injection at birth. It also supports bone health by regulating calcium metabolism.
Explanation of each option:
· (a) Vitamin B₁₂ – Important for red blood cell production and nerve function, but not involved in clotting factor synthesis.
· (b) Vitamin A – Helps in vision, immune function, and epithelial health, but not related to coagulation.
· (c) Vitamin E – Acts as an antioxidant; in fact, excess vitamin E can impair blood clotting slightly.
· (d) Vitamin K – Correct. Directly involved in blood clotting by activating clotting proteins (factors II, VII, IX, X).