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': 'A male is taking 60mg. of hydrocortisone daily. On the day before extraction, this dose should be \nSelect and explain. \nA. Remain unchanged, B. Reduced to half, C. Doubled, D. Reduced to one fourth', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]