This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Multiple sclerosis is a \nSelect and explain. \nA. Demyelinating disease, B. Infective lesion, C. Peripheral nervous system disorder, D. Associated with systemic illness', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Demyelinating disease # MULTIPLE SCLEROSIS (MS) is characterized by a triad of inflammation, demyelination, and gliosis (scarring); the course can be relapsing-remitting or progressive.> Lesions of MS are typically disseminated in time and location.> Demyelinating disorders are characterized by inflammation and selective destruction of central nervous system myelin.> Peripheral nervous system is spared, and most patients have no evidence of associated systemic illness.', 'role': 'assistant'}]