Vitamin needed for blood clotting–

Correct option is D

Sol. Vitamin K is essential for synthesizing clotting factors (II, VII, IX, and X) in the liver, which are critical for normal blood coagulation. Deficiency can lead to bleeding disorders, easy bruising, and prolonged clotting time. Newborns are routinely given a Vitamin K injection to prevent hemorrhagic disease.
Explanation of each option:
· (a) Vitamin A – Important for vision and epithelial cell health, but not related to blood clotting.
· (b) Vitamin B – Refers to a complex group of water-soluble vitamins involved in energy metabolism and nerve function, not clotting.
· (c) Vitamin E – An antioxidant that protects cells but in large doses may actually inhibit blood clotting by thinning the blood.
· (d) Vitamin K – Correct Answer. It activates clotting factors and plays a direct role in hemostasis. Found in green leafy vegetables and also synthesized by gut bacteria.