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': 'All the following are sex-cord tumors, EXCEPT: \nSelect and explain. \nA. Granulosa cell tumor, B. Seoli-leydig cell tumor, C. Dysgerminoma, D. Gynandroblastoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Sex cord (gonadal stromal) tumors include: Granulosa cell tumors, theca cell tumors Androblastoma - Seoli-Leydig cell tumor Gynandroblastoma Unclassified Dysgerminoma is a germ cell tumor. Ref: Shaw's textbook of gynaecology, edition 12, Page - 313.", 'role': 'assistant'}]