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: Radiology
[{'content': 'Investigation of choice for intramedullary SOL is – \nSelect and explain. \nA. MRI, B. USG, C. CT, D. X–ray', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Investigation of choice for intramedullary space occupy lesion is MRI.', 'role': 'assistant'}]