This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'What diameter of cerebellar hematoma will require surgical evacuation \nSelect and explain. \nA. > 0.5 cm, B. > 1 cm, C. > 2 cm, D. > 3 cm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most cerebellar hematomas >3 cm in diameter will require surgical evacuation. If the patient is ale without focal brainstem signs and if the hematoma is <1 cm in diameter, surgical removal is usually unnecessary. Patients with hematomas between 1 and 3 cm require careful observation for signs of impaired consciousness, progressive hydrocephalus, and precipitous respiratory failure.Reference: Harrison 19th edition 2585', 'role': 'assistant'}]