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Auto-immune disease arises when
Aantibodies fail to form (typical)
Bbacteria mutate
Cvaccines wear off
Dthe immune system attacks the body's own tissues
Answer & Solution
Correct answer: D. the immune system attacks the body's own tissues
1. In auto-immunity the immune system loses self-tolerance.
2. Antibodies and T cells target the body's own antigens, damaging organs.
3. Examples include rheumatoid arthritis, multiple sclerosis and SLE.
_Source: Maharashtra Balbharati Std XII Biology, Ch 9 "Human Health and Diseases" §9.4_
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