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': 'Ampicillin prophylaxis is given in - \nSelect and explain. \nA. Rectal surgery, B. Splenectomy, C. Head and neck surgery, D. Biliary surgery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Prophylactic antibiotics in biliary surgery are designed to reduce the incidence of postoperative wound infections.\n• The efficacy of antibiotics in the prevention of wound infections has been demonstrated with first, second and third generation cephalosporins, ampicillin\xa0associated with clavulanate, ureido-penicillins, aminoglycosides, sulfonamides and quinolones.', 'role': 'assistant'}]