<prompt> Anal carcinoma is most commonly of type?AdenocarcinomaEpidermoidMixedNone of the above  <response>: Epidermoid carcinoma of the anus includes squamous cell carcinoma, cloacogenic carcinoma, transitional carcinoma and basaloid carcinoma. The clinical behaviour and natural history of these tumors is similar. Ref: Schwaz 9e, Page 1053; Maingots 10e, Page 1505. 