True about anal membrane: (A) Perforates at 6 weeks, (B) Develops from anterior pa of cloacal membrance, (C) Lies at proximal pa of proctodaeum, (D) Covers urogenital sins
Answer is C. Before the urorectal septum has an oppounity to fuse with the cloacal membrane, the membrane ruptures, exposing the urogenital sinus and dorsal anorectal canal to the exterior. Later on, an ectodermal plug, the anal membrane, forms to create the lower third of the rectum. ref - Semantischolar.org ref - BDC vol2