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: Anatomy
[{'content': 'Appendix of testis is remnant of ? \nSelect and explain. \nA. Mesonephric duct, B. Mesonephric tubules, C. Wolffian duct, D. Mullerian duct', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mullerian duct', 'role': 'assistant'}]