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NEET 2019 Odisha · BiologyPrevious Year Question

Which of the following diseases is an autoimmune disorder?

Answer: (A) Myasthenia gravis. Answer: (A) Myasthenia gravis Solution: An autoimmune disease is one in which the body attacks its own self-cells.

  1. A.Myasthenia gravis✓
  2. B.Arthritis
  3. C.Osteoporosis
  4. D.Gout

Correct Answer

(A) Myasthenia gravis

Solution & Explanation

Answer: (A) Myasthenia gravis Solution: An autoimmune disease is one in which the body attacks its own self-cells. Myasthenia gravis is such a disorder; NCERT cites rheumatoid arthritis as the classic example of an auto-immune disease, and myasthenia gravis belongs to the same category. Why others are wrong: Osteoporosis (bone density loss) and gout (uric-acid crystal deposition) are metabolic disorders, and 'arthritis' in general (e.g., osteoarthritis) is degenerative, not autoimmune. NCERT Reference: NCERT Ch7, p.137, lines 31-34: "the body attacks self-cells. This results in damage to the body and is called auto-immune disease"

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