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': 'A 45-year-old female is having bilateral ovarian mass, ascites and omental caking on CT scan. There is high possibility that patient is having: \nSelect and explain. \nA. Benign ovarian tumor, B. Malignant epithelial ovarian tumor, C. Dysgerminoma of ovary, D. Lymphoma of ovary', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]