This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
[{'content': 'Biotin is a coenzyme for: \nSelect and explain. \nA. Pyruvate dehydrogenase, B. Pyruvate carboxylase, C. PEP carboxylase, D. Glutamate pyruvate transaminase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Pyruvate carboxylaseBiotin is required as a co-enzyme of carboxylation reactions. Pyruvate carboxylase converts pyruvate to oxaloacetate.', 'role': 'assistant'}]