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: Forensic Medicine
[{'content': 'Investigation of choice in SAH: NIMHANS 07; FMGE 11 \nSelect and explain. \nA. CT scan, B. MRI, C. X-ray skull, D. Radionuclide scan', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. CT scan', 'role': 'assistant'}]