The correct answer is option (2) as Myasthenia gravis, Rheumatoid arthritis and Systemic Lupus Erythematosus (SLE) are autoimmune disorders. Muscular dystrophy is a genetic disorder which progressively affects the skeletal muscles. Gout is the inflammation of joints due to deposition of uric acid crystals. Option (1), (3) and (4) are not the correct answer because all of them are not autoimmune disorders.