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': 'Trigone of urinary bladder develops from \nSelect and explain. \nA. Urogenital sinus, B. Vesicourethral canal, C. Mesonephric duct, D. Endoderm', 'role': 'user'}, {'content': "Answer: C \nExplanation: The terminal poion of Mesonephric duct gets absorbed into the posterior wall of urogenital sinus and forms the trigone of the urinary bladder. Urinary bladder develops from endodermal vesicourethral canal. Ref: Gray's 39e/p-1289", 'role': 'assistant'}]