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': 'Commonest histology of carcinoma of endometrium is : \nSelect and explain. \nA. Squamous cell, B. Clear cell, C. Adenocarcinoma, D. Anaplastic carcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Adenocarcinoma', 'role': 'assistant'}]