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': 'Stephen fowler surgery is done for \nSelect and explain. \nA. Undescended testis, B. Ectopic testis, C. Retractile testis, D. Testicular torsion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Stephen fowler surgery is two stage surgery for undescended testis.', 'role': 'assistant'}]