<prompt> True about Crohn disease are all EXCEPT?Loss of haustrationGrowth failureCobblestone colonPerianal fistula formation  <response>: Discussing about the options one by one, a. Loss of haustrations is a feature of ulcerative colitis b. Growth failure can even be the only manifestation of Crohn disease. c. Linear ulcers can give a cobblestone appearance to the mucosal surface in Crohn disease d. Perianal disease is common tag, fistula, deep fissure, abscess in Crohn disease 