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: Physiology
[{'content': 'Marker Enzyme of Mitochondria are/is: \nSelect and explain. \nA. Na+ - K+ ATPase, B. Glutamic dehydrogenase, C. Lactate dehydrogenase, D. No specific enzyme', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Glutamic dehydrogenase', 'role': 'assistant'}]