This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
All the following muscles are attached to Perineal body except 
Select and explain. 
A. Bulbospongiosus, B. Ischiocavernosus, C. Superficial Transverse Perinei, D. Levator ani
B: Ischiocavernosus
Answer: B: Ischiocavernosus 
Explanation: Ten muscles of the perineum converge and interlace in the perineal body.Two unpairedExternal anal sphincterFibers of longitudinal muscle coat of anal canalPairedBulbospongiosusSuperficial and deep transversus pereneiLevator aniReference: Chaurasia Volume II; 7th edition; Page no: 383