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: Anatomy
Urinary bladder develops from ? 
Select and explain. 
A. Preallantoic hind gut, B. Proctodeum, C. Cloaca, D. None
C: Cloaca
Answer: C: Cloaca 
Explanation: Postallantoic pa of hind gut is the dilated endodermal cloaca, which is separated from the surface by cloacal mambrane.Urorectal septum divides endodermal cloacae into :-i) Anterior pa, known as primitive urogenital sinus, which develops into urinary bladder and urethra.ii) Posterior pa, known as primitive rectum, which gives rise to lower pa of rectum and upper pa of anal canal.