This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
[{'content': 'Optimal timing of administration of prophylactic antibiotic for surgical patients is: \nSelect and explain. \nA. At the induction of anesthesia, B. Any time during the surgical procedure, C. One hour after induction, D. One hour prior to induction of anesthesia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: IV administration at induction of anesthesia is optimal. If induction is not mentioned in the option go for 30 minutes to 1 hours before surgery.', 'role': 'assistant'}]