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 lady presented with carcinoma endometrium involving >50% of myometrium extending to vagina and positive peritoneal cytology but no involvement of para aortic and pre aortic nodes. What is the stage of disease \nSelect and explain. \nA. Ill A, B. Ill C2, C. Ill C1, D. Ill B', 'role': 'user'}, {'content': "Answer: D \nExplanation: Endometrial cancer stage III:\nStage IIIA: Involvement of uterine serosa and/ or adnexa\nStage IIIB: Involvement of\xa0vagina\xa0and/or parametrium\nStage IIIC:\n\nIIIC1: Positive\xa0Pelvic nodes\nIIIC2: Positive\xa0Paraaortic nodes with or without positive pelvic nodes\n\n\u200bPositive peritoneal cytology doesn't alter the stage", 'role': 'assistant'}]