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: Surgery
[{'content': "Which of the following is commonest source of Extradural haemorrhage - \nSelect and explain. \nA. Middle meningeal artery, B. Subdural venous sinus, C. Charcot's artery, D. Middle cerebral artery", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]