All of the following are autoimmune disease except?: (A) SLE, (B) Grave's disease, (C) Myasthenia gravis, (D) Sickle cell disease
Answer is D. Robbins basic pathology 6th edition. Chapter Red cells and bleeding disorders. page no. 611.. sickle cell disease is a hereditary hemoglobinopathy, occuring due to mutation in beta globin chain. while all others are autoimmne diseases. so, answer is option 4.