This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aetiology (Carcinoma Ovary), Subject name: Gynaecology & Obstetrics
[{'content': 'Commonest ovarian tumour below 20 year of age is - \nSelect and explain. \nA. Epithelial cell tumour, B. Sertoli call tumour, C. Leydig cell tumour, D. Germ cell tumour', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is \'d\' Germ cell tumour" (Ref : Shaws, 13/e, p 359 (12/e, p 575)).Most common ovarian tumour in young woman is - germ cell tumour*common ovarian tumour (overall) - epithelial cell tumour*.Commonest cystic ovarian neoplasm - serous cystadenoma*.Ovarian tumour causing pseudomyxoma peritonei - Mucinous tumour*Ovarian tumour causing Meigs\' syndrome - ovarian fibroma*.Ovarian tumour causing pseudo Meigs\' syndrome - Brenner tumour*.', 'role': 'assistant'}]