This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
[{'content': 'Vitamin K is involved in the post translational modification of \nSelect and explain. \nA. Glutamate, B. Aspaate, C. Glycine, D. GABA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer Katzung 11/e p 595 Vitamin K causes gamma carboxylation of glutamate reduces in many clotting factors that result in their activation', 'role': 'assistant'}]