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 20-year old male presents with severe headache, vomiting and altered sensorium of 2 days duration. Which of the following disease will not be considered in the differential diagnosis ? \nSelect and explain. \nA. Acute viral encephalitis, B. Subarachnoid hemorrhage, C. Migraine, D. Cortical venous thrombosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]