Trigone of bladder is derived from?: (A) Distal pa of Paramesonephric duct, (B) Distal pa of Mesonephric duct, (C) Ventral pa of Mesonephric duct, (D) Ventral pa of Urogenital sinus
Answer is B. Trigone of bladder is formed from distal pa of mesonephric duct. Other pas of urinary bladder derive from Endoderm of urogenital sinus. Proximal pa of mesonephric duct aka wolffian duct forms ductus deferens in males.