This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood: Hemostasis and Blood Coagulation, Subject name: Physiology
[{'content': 'The biochemical role of vitamin K in the post- translational modification of clotting factors is by? \nSelect and explain. \nA. Glycosylation, B. Carboxylation, C. Acetylation, D. Phosphorylation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) CarboxylationVitaminActionsDeficiency SynptomesSourcesK groupCatalyze g carboxylation of glutamic acid residues on various proteins concerned with blood clottingHemorrhagic phenomenaLeafy green vegetables', 'role': 'assistant'}]