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: Radiology
[{'content': 'The MR imaging in multiple sclerosis in the following illustration will show lesions in: \nSelect and explain. \nA. White matter, B. Grey matter, C. Thalamus, D. Basal ganglia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. White matterMultiple sclerosis is a demyelinating disorder. Hence the lesions will be seen in the white matter (due to loss of myelin).Sagittal T1-weighted MRI depicts multiple hypointense lesions in the corpus callosum; this finding is characteristic of multiple sclerosis.', 'role': 'assistant'}]