This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
[{'content': 'Earliest manifestation of increased intracranial pressure following head injury is \nSelect and explain. \nA. Ipsilateral papillary dilatation, B. Contralateral papillary dilation, C. Altered mental status, D. Hemiparesis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) Altered mental statusRef: Bailey 26th 310Altered mental status is the earliest manifestation of increased intracranial pressure.Cushing's triad of increased ICP* Intracranial hypertension* Brady cardia* Irregualr respiration", 'role': 'assistant'}]