This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
[{'content': 'Bilateral germ cell tumour is: \nSelect and explain. \nA. Dysgerminoma, B. Immature teratoma, C. Embryonal cell carcinoma, D. Endodermal sinus tumour', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p> -Germ cell tumors are common in children and young adults and are derived from primordial germ cells of the ovary. -among germ cell tumors, only dysgerminoma is bilateral (15%). Reference : textbook of gynaecology Sheila balakrishnan, 2nd edition, pg no:-282 <\\p>', 'role': 'assistant'}]