This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Vit k helps in gamma-carboxylation of following AA \nSelect and explain. \nA. Glutamate, B. Aspaate, C. Glycine, D. Alanine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Vitamin k plays a role in gama carboxylation of glutamate containing proteins It is a posttransilational modification Ref:Guyton and Hall textbook of medical physiology 12th edition,page number: 20,21,22', 'role': 'assistant'}]