This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroradiology, Subject name: Radiology
[{'content': 'IOC for stroke is \nSelect and explain. \nA. NCCT, B. X-ray, C. MRI, D. CECT', 'role': 'user'}, {'content': 'Answer: A \nExplanation: IOC FOR STROKE is NCCT as it differentiates hemorrhagic stroke from ischemic stroke The initial investigation in all cases of Cerebrovascular accidents should be NCCT IOC FOR ISCHEMIC STROKE/ACUTE INFARCT is DWI-MRI IOC for Head trauma is NCCT IOC For Acute SAH IS NCCT', 'role': 'assistant'}]