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': 'Congenital lactic acidosis may occur d/t defect in \nSelect and explain. \nA. Pvruvate decarboxylase, B. PDH complex, C. Transketolase, D. a-ketoglutarate dehydrogenase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. PDH complex', 'role': 'assistant'}]