Vitamin required for production of Thrombin is:: (A) Vitamin A, (B) Vitamin D, (C) Vitamin K, (D) Vitamin E
Answer is C. Vitamin K brings about post translational modification of ceain blood clotting factors. The clotting factor -II (Prothrombin) -VII -IX -X are synthesized as inactive precursors (zymogens ) in the liver.