<prompt> True regarding crohns disease are AESclerodermaTransmural involvementCobble stone appearanceSkin involvement  <response>: The skin involvement in Crohns disease causes erythema nodosum, scleroderma does not occur in Crohns disease.Other extraintestinal manifestations of Crohns disease:Migratory polyarthritis Uveitis Clubbing SacroiliitisHepatic pericholangitis Renal stones uric acid oxalateAnkylosing spondylitisPrimary sclerosing cholangitis 