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': 'All of the following are features of multiple sclerosis except \nSelect and explain. \nA. CSF shows oligoclonal bands, B. Antibodies to aquaporin -4 present, C. Lesions are disseminated in time and space, D. Risk is more in females', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Antibodies to aquaporin -4 are found in neuromyelitis optica', 'role': 'assistant'}]