This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Anatomy
[{'content': 'Trigone of bladder is derived from? \nSelect and explain. \nA. Distal pa of Paramesonephric duct, B. Distal pa of Mesonephric duct, C. Ventral pa of Mesonephric duct, D. Ventral pa of Urogenital sinus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]