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
The ureter is lined by .................ephithelium 
Select and explain. 
A. Stratified squamous, B. Cuboidal, C. Ciliated columnar, D. Transitional
D: Transitional
Answer: D: Transitional 
Explanation: Ureters - Ureters are muscular tubes that conduct urine from renal pelvis to the urinary bladder. The wall of the ureter has three layers: An inner lining of mucous membrane , A middle layer of smooth muscle, An outer fibrous coat: adventitia. Mucous Membrane -The mucous membrane has a lining of transitional epithelium that is 4 to 5 cells thick and an underlying connective tissue, lamina propria. The mucosa shows a number of longitudinal folds that give the lumen a star-shaped appearance in transverse section. The folds disappear when the ureter is distended. REF: Inderbir Singh's Textbook of Human Histology, seventh edition, pg.no.,317.