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: Gynaecology & Obstetrics
[{'content': 'Para - ovarian cyst are derived from : \nSelect and explain. \nA. Wolffian duct, B. Mullerian duct, C. Ganers duct, D. Pronephros', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Wolffian duct', 'role': 'assistant'}]