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': 'The most malignant endometrial carcinoma is: \nSelect and explain. \nA. Adenocarcinoma, B. Adenoacanthoma, C. Mixed adenosquamous carcinoma, D. Clear cell carcinoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Endometrial cancers can be histologically classified as', 'role': 'assistant'}]