This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Unpaired muscle of perineal body among the following is \nSelect and explain. \nA. Bulbospongiosus, B. Longitudinal muscle of anal canal, C. Deep transverse perineal muscle, D. Levator Ani', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The two Unpaired muscles of perineal body are\n\nLongitudinal muscle of anal canal\nExternal and sphincter', 'role': 'assistant'}]