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: Medicine
[{'content': 'The diagnositc test for cerebral cysticercosis \nSelect and explain. \nA. MRI, B. Non contrast CT scan, C. Contrast CT scan, D. Plain x-ray', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]