This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': "Opsoclonus-Myoclonus is a phenomenon seen in \nSelect and explain. \nA. Wilm's tumor, B. Meningioma, C. Neuroblastoma, D. Coical tuberculoma", 'role': 'user'}, {'content': "Answer: B \nExplanation: Opsoclonus-myoclonus syndrome(OMS) is a rare disorder that affects the nervous system. Symptoms include rapid, multi-directional eye movements (opsoclonus), quick, involuntary muscle jerks (myoclonus), uncoordinated movement ( ataxia ), irritability, and sleep disturbance. Ref ganong's review of medical physiology 25e p978", 'role': 'assistant'}]