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 derived from which of the embryonic structures given below? \nSelect and explain. \nA. Paramesonephric duct, B. Mesonephric duct, C. Hind gut, D. Cloaca', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The appendix testis (or hydatid of Morgagni) is a vestigial remnant of the Mullerian duct (Paramesonephric Duct), present on the upper pole of the testis and attached to the tunica vaginalis. It is present about 90% of the time.', 'role': 'assistant'}]