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': 'Which of the following is not done in case of obstructed inguinal hernia - \nSelect and explain. \nA. Aspiration of the sac for diagnosis, B. X-ray abdomen, C. USG abdomen, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'a' i.e. Aspiration of the sac for diagnosis; 'b' i.e. X-ray abdomen; 'c' i.e. USG-abdomen", 'role': 'assistant'}]