Boundaries of ischiorectal fossa are: (A) Posterior : Perineal membrane, (B) Anterior : Sacrotuberous ligament, (C) Lateral : Obturator internus, (D) Medial : Gluteus maximus
Answer is C. The boundaries of ischiorectal fossa: floor: deep transverse perineal fascia. medial wall: external anal sphincters/anal canal; levator ani muscle. lateral wall: ischial tuberosity; obturator internus muscle; obturator fascia. apex: intersection of levator ani and obturator internus muscle ref - BDC vol2 pg415, researchgate.net