Which of the following is an autoimmune disease

Explanation :- 

Autoimmune disease is a disease which occurs when our body’s immune system fails to distinguish between body cells and foreign cells.

Graves disease is an autoimmune disease in which overproduction of thyroid hormone occurs.

Type 1 diabetes is an autoimmune disease during which immune cells start destroying their own insulin producing cells of the pancreas.

Rheumatoid arthritis is also an autoimmune disease during which immune cells attack our body cells and cause painful swellings. It mainly affects joints.

Final answer :- 

The correct answer is all of the above, i.e option (D).