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 meningeal carcinomatosis is - \nSelect and explain. \nA. Contrast enhanced MRI, B. PET – CT, C. SPECT, D. NCCT', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]