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': 'All/except are true about MS: \nSelect and explain. \nA. Corpus callosum lesions are characteristic, B. Periventricular white matter distribution with decreased CT attenuation, C. T1WI are most diagnostic for acute plaques, D. Hyper intense T2WI', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. T1WI are most diagnostic for acute plaques', 'role': 'assistant'}]