This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Malformation of the Female Generative Organs, Subject name: Gynaecology & Obstetrics
[{'content': 'Regression of Mullerian duct in males occurs at: \nSelect and explain. \nA. 5 weeks, B. 6 weeks, C. 7 weeks, D. 8 weeks', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d, i.e. 8 weeksRef: Leon Speroff 8th/ed, p342"AMH gene expression is induced by SOX-9 in sertoli cells and results in the ipsilateral regression of mullerian ducts by 8 weeks in males"', 'role': 'assistant'}]