The correct option is A Alzheimer's disease
An autoimmune disease is a condition in which the immune system mistakenly attacks the body.
Alzheimer's disease - a progressive neurologic disorder that causes the brain cells to die. It is not considered an autoimmune disorder.
Rheumatoid arthritis - immune system attacks the lining of the joints.
Psoriasis - immune system attacks the skin cells as foreign invaders. This causes the skin cells to rapidly multiply, leading to the characteristic psoriasis skin lesions.
Vitiligo - the immune system attacks the pigment cells (melanocytes) in the skin.
Rheumatoid arthritis, psoriasis and vitiligo are autoimmune disorders.