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': 'Laparotomy performed in a case of ovarian tumor revealed unilateral ovarian tumor with ascites positive for malignant cells and positive pelvic lymph nodes. All other structures were free of disease. What is stage of her disease? \nSelect and explain. \nA. Stage II c., B. Stage III a., C. Stage III b., D. Stage III c.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Since the patient has ovarian tumor with ascities positive for malignant cells and positive pelvic lymph nodes, she falls under FIGO staging, stage IIc. Ref: Textbook of Gynecology By D C Dutta, 4th Edition, Page 346', 'role': 'assistant'}]