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
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 ? 
Select and explain. 
A. Acute viral encephalitis, B. Subarachnoid hemorrhage, C. Migraine, D. Cortical venous thrombosis
C: Migraine
Answer: C: Migraine 
Explanation: None