Trigone of urinary bladder develops from: (A) Urogenital sinus, (B) Vesicourethral canal, (C) Mesonephric duct, (D) Endoderm
Answer is C. 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