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: Surgery
[{'content': 'The earliest manifestation of increased intracranial pressure following head injury is \nSelect and explain. \nA. Ipsilateral pupillary dilatation, B. Contralateral pupillary dilation, C. Altered mental status, D. Hemiparesis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: • Early signs of elevated ICP includes drowsiness and a diminished level of consciousness.\n• Coma and unilateral papillary changes are late signs and require immediate intervention.', 'role': 'assistant'}]