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': 'A young girl presents with repeated episodes of throbbing occipital headache associated with ataxia and vertigo. The family history is positive for similar headaches in her mother. Most likely diagnosis is - \nSelect and explain. \nA. Vestibular Neuronitis, B. Basilar migraine, C. Cluster headache, D. Tension headache', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]