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': 'The MR imaging in multiple sclerosis will show lesions in: \nSelect and explain. \nA. White matter, B. Grey matter, C. Thalamus, D. Basal ganglia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. White matter', 'role': 'assistant'}]