<s>[INST] context: o Most common ovarian tumour (over all) - Epithelial celt tumour o Most common tumour in young women - Germ celt tumour o Most common malignant tumour of the ovary - Serous cystadenocarcinoma o Most common benign tumour of the ovary (over all) - Dermoid cyst o Most common benign epithelial tumour of the ovary - Serous cystadenoma o Most common germ cell tumour of the ovary - Mature teratoma (Dermoid cyst) o Most common malignant germ cell tumour of the ovary - Dysgerminoma o Most common ovarian tumour in pregnancy (remains undiagnosed) - Serous cystadenoma o Most common benign rumour diagnosed in pregnancy - Dermoid cyst o Most common tumour diagnosed in pregnancy over all - Dermoid cyst o Most common malignant tumour diagnosed in pregnancy - Dysgerminoma o Most common ovarian tumour to undergo torsion in pregnancy - Dermoid cyst o Most common tumour to involve opposite ovary by metastasis - Granulosa cell tumour o Most radiosensitive ovarian tumour - Dysgerminoma o Most rapidly growing ovarian tumour - Yolk sac tumour o Most common connective tissue tumour - fibroma [/INST] question: Most common germ cell tumor is -' | options: A: Teratoma B: Choriocarcinoma C: Endodermal sinus tumor D: Mixed germ cell tumor | answer: A </s>