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NEET UG BIOLOGY MCQ: CHEMICAL COORDINATION AND INTEGRATION

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The decline and disappearance of …… gland by the middle age is primary cause of ageing
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Correct option: B
Thymus
Option B (Thymus) is correct because the thymus gland undergoes significant involution (decline and disappearance) by middle age, contributing to the aging process due to a weakened immune system.

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