B. Between the perineum and other regions.
Gap between pubic symphysis and perineal membrane• Dorsal vein of penis and clitorisSacrotuberous ligamentSacrospinous ligamentOrifices in floor• Urethra• Vagina• AnusLesser sciatic foramen• Obturator internus muscle• Pudendal nerve• Internal pudendal vein  and arteryB