This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urogenital System, Subject name: Anatomy
Trigone of bladder is derived from - 
Select and explain. 
A. Mesonephric duct, B. Paramesonephric duct, C. Absorbed anal membrane, D. Mullerian duct
A: Mesonephric duct
Answer: A: Mesonephric duct 
Explanation: Ans. is 'a' i.e., Mesonephric duct o The urinary bladder (except trigone) is derived from vesicourethral canaL cranial part of urogenital sinus (endodermal).o Trigone is derived from Absorbed part of Wolffian duct/mesonephrk duct (mesodermal).