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': 'Which is not a germ cell tumour : \nSelect and explain. \nA. Dysgerminoma, B. Teratoma, C. Granulosatheca cell tumour, D. Embryonal cell cercinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Granulosatheca cell tumour', 'role': 'assistant'}]