Match List-I (emission of gas) with List-II (impact on health):
List I
i.Carbon monoxide
ii.Nitrogen oxide
iii.Pesticides
iv.Phosgene
List II
a.Endocrine and immune system
b.Pulmonary oedema
c.Affects oxygen-carrying capacity to different parts of the body
d.Heart problems, respiratory irritation, bronchitis, asthma and carcinogenic issues
Ai-c, ii-d, iii-a, iv-b ✓ Correct
Bi-b, ii-d, iii-a, iv-c
Ci-c, ii-a, iii-d, iv-b
Di-d, ii-c, iii-b, iv-a
Correct answer: (A) i-c, ii-d, iii-a, iv-b
Explanation
The correct pairing links carbon monoxide to reduced oxygen transport, nitrogen oxide to heart and airway disease, pesticides to endocrine-immune harm, and phosgene to lung oedema.
Carbon monoxide binds haemoglobin and cripples the blood's oxygen-carrying capacity to body tissues.
Nitrogen oxide triggers heart trouble, airway irritation, bronchitis, asthma and carcinogenic effects.
Pesticides disturb the endocrine and immune systems.
Phosgene, a war gas, floods the lungs to cause pulmonary oedema.
These matched effects reflect each gas's distinct site of action in the body.
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