Anal transition zone is ?: (A) columnar - cuboidal - squamous, (B) columnar-squamous - cuboidal, (C) squamous-cuboidal-columnar, (D) cuboidal-squamous-columnar
Answer is A. Anal transition zone is Columnar-Cuboidal-Squamous Dentate line (Pectinate line)is Sqaumocolumnar junction below to it is Squamous epithelium and above to it is transitional zone which is Columnar - Cuboidal epithelium.