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': 'Mcdonald’s criteria is used in diagnosis of \nSelect and explain. \nA. Friedreich ataxia, B. Multiple myeloma, C. Multiple sclerosis, D. Lateral sclerosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Multiple sclerosis is diagnosed by Mcdonald’s criteria', 'role': 'assistant'}]