This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'Vitamin K carboxylates \nSelect and explain. \nA. Aspaate, B. Glutamate, C. Tyrosine, D. Tryptophan', 'role': 'user'}, {'content': "Answer: B \nExplanation: The vitamin K-dependent (VKD)3carboxylase is a bifunctional enzyme that catalyzes the oxygenation of vitamin Khydroquinone, resulting in formation of vitamin K epoxide, in parallel with the carboxylation of multipleglutamate (Glu) residues in vitamin K-dependent proteins Ref ganong's review of medical physiology 25e", 'role': 'assistant'}]