Which of the following is an example of auto-immune disease?

Rheumatoid arthritis

The correct answer is Option (1) → Rheumatoid arthritis

Autoimmune disorder is a condition of the body in which the body's defense mechanism fails to differentiate between self and non-self cells and start attacking self cells .Rheumatoid arthritis is an autoimmune disease. This means that the body's immune system, which is normally responsible for protecting the body from foreign invaders, mistakenly attacks the body's own cells. In the case of rheumatoid arthritis, the immune system attacks the synovium, the tissue that lines the joints. This causes inflammation, pain, and swelling in the joints.