Which of the following is an autoimmune disease:

The correct option is D All of the above

• An autoimmune disease is a condition arising from an abnormal immune response to normal body parts. Common symptoms include low-grade fever and feeling tired.
  
• Rheumatoid arthritis is a long-term autoimmune disorder that primarily affects joints. It typically results in warm, swollen, and painful joints.
  
• Multiple sclerosis is the most common autoimmune disorder affecting the central nervous system. Multiple sclerosis is a demyelinating disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged.
  
• Type 1 diabetes is an autoimmune disease as in this condition the immune system destroys the body's own insulin-making cells present in the pancreas. This results in the dysregulation of blood-sugar level.
• Symptoms include frequent urination, increased thirst, and increased hunger. It is an autoimmune disease in which pancreatic beta cells are destroyed.
  

So, the correct answer is 'All of the above'.