This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
[{'content': 'What is histological appearance of vaginal mucosa ? \nSelect and explain. \nA. Stratified squamous, B. Glandular, C. Simple squamous, D. Cuboidal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The vagina is a muscular tube. The lining epithelium is stratified squamous. Underneath the epithelium is a layer of lamina propria, which is rich in elastic fibres, and does not have any glands. Under the lamina propria layer is a layer of smooth muscle, which has an inner circular and outer longitudinal layer. Finally, there is an adventitial layer, which merges with that of the bladder (anteriorly) and rectum (posteriorly). ref - BDC 6e vol2 pg', 'role': 'assistant'}]