In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self-cells, then it leads to:

(A)Active immunity
(B)Allergic response
(C)Graft rejection
(D)Auto-immune disease

The NCERT line that answers it

Verbatim line

Two, sometimes, due to genetic and other unknown reasons, the body attacks self-cells.

Chapter: Human Health and Disease
Section: 7.2.6 Auto Immunity
Page: 10
Words matched: 25 of 25

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

3333, emb=1.0, combined=0.7333). Verified: high — The span explicitly states that attacking self-cells due to genetic reasons results in auto-immune disease, which directly matches the MCQ's scenario and distinguishes it from other options.

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Question text is reproduced from the published NEET 2016 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.