This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
[{'content': 'Largest benign ovarian tumor is - \nSelect and explain. \nA. Serous cyst adenoma, B. Mucinous cyst adenoma, C. Dermoid cyst, D. Dysgerminoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Mucinous cyst adenoma * Serous cyst adenoma accounts for 40% of ovarian tumors, it is bilateral in 40% cases, and it can turn malignant (adenocarcinoma) in 40% cases. It is the MC ovarian tumor.* Mucinous cyst adenoma is the largest benign ovarian tumor", 'role': 'assistant'}]