This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
[{'content': 'MRI is the investigation of choice in all of the following except: \nSelect and explain. \nA. Syringomyelia, B. Brain stem tumors, C. Skull bone tumors, D. Multiple sclerosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Skull bone tumors* MRI is best for soft tissue tumors* CT is best for Bone tumors* Imaging modality of choice to detect cerebral necrosis - PET scan.* IOC for Leptomeningeal Carcinomatosis-Gadolinium enhanced MRI', 'role': 'assistant'}]