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NEET UG BIOLOGY MCQ: CHEMICAL COORDINATION AND INTEGRATION

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Understanding +4 | -1
A: Immune response of old person becomes weak
R: Thymus is degenerated in old individual
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Correct option: A
A and R are correct R is correct explanation for A
The correct answer is A (A and R are correct R is correct explanation for A) because the thymus gland degenerates in old age, which weakens the immune response.

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