<prompt> An autoimmune disease is a Pemphigus vulgarisb Psoriasisc Lichen planusd Acne vulgarisabcbcacdbcd  <response>: Autoimmune skin disordersAutoimmune bullous skin disordersPemphigusBullous pemphigoidDermatitis herpetiformisLichen planusLichen planus is believed to be an autoimmune disorder as it often occurs concurrently with other autoimmune disorders like primary biliary cirrhosis, diabetes, chronic active hepatitis.Psoriasis The theory that psoriasis is an autoimmune disorder is based on the fact that scientist have found an abnormally large number of T cells in the patch of psoriasis.Autoimmune connective tissue disordersLupus erythematosusDermatomyositisSclerodermaMixed connective tissue diseaseBechets disease 