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': 'Masculinising tumour of ovary is : \nSelect and explain. \nA. Dysgerminoma, B. Granulose cell tumour, C. Arrhenoblastoma, D. Dermoid cyst', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Arrehnoblastoma', 'role': 'assistant'}]