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': 'In cholecystectomy, fresh frozen plasma should be given \nSelect and explain. \nA. Just before operation, B. At the time of operation, C. 6 hours before operation, D. 12 hours after operation', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Just before operation", 'role': 'assistant'}]