This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Lining epithelium of the uterine cavity is \nSelect and explain. \nA. Simple squamous epithelium, B. Simple columnar epithelium, C. Stratified squamous epithelium, D. Ciliated columnar epithelium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The endometrium, or mucosal lining of the uterus, is composed of a simple columnar epithelium and a lamina propria. The epithelium is composed of nonciliated secretory columnar cells and ciliated cells, whereas the lamina propria houses simple branched tubular glands that extend as far as the myometrium.Ref: Textbook of histology; 4th edition; Chapter 20; Female Reproductive System', 'role': 'assistant'}]