<prompt> During incision drainage of ischiorectal abscess, which nerve isare affectedinjured :Superior rectal nerveInferior rectal nerveSuperior gluteal nerveInferior gluteal nerve  <response>: Ans: B Inferior rectal nerve Fig: Coronal section through the ischiorectal fossaIlioinguinal nerve, supply the skin of external genitalia upper part of the medial side of the thigh- BDC4thVol. II 196Ischioanal Fossa formerly called ischiorectal fossaIt is somewhat prismatic in shape, with its base directed to the surface of the perineum, and its apex at the line of meeting of the obturator and anal fasciae.Contents of the Ischiorectal fossaIschiorectal pad of fatInferior rectal nerve and vessels.Posterior scrotal posterior labial nerve and vessels.Pudendal canal and its contentsfpudendal nerve internal pudendal vesselPerineal branch of fourth sacral nerve.Perforating cutaneous branch ofS2, S3 nerve 