This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hernia, Subject name: Surgery
[{'content': 'Name the retractor? \nSelect and explain. \nA. Deaver retractor, B. Richardson retractor, C. Malleable retractor, D. Goulet', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Deaver retractor', 'role': 'assistant'}]