This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Both Vitamin K and C are involved in: \nSelect and explain. \nA. The synthesis of clotting factors, B. Post translational modifications, C. Antioxidant mechanisms, D. The microsomal hydroxylation reactions', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]