Match List-I with List-II.
| List-I | List-II | ||
|---|---|---|---|
| (Air pollutant) | (Affected organ) | ||
| (A) | Lead | (I) | Lungs |
| (B) | Mercury | (II) | Brain |
| (C) | Carbon monoxide | (III) | Stomach |
| (D) | Asbestos dust | (IV) | Nerves and arteries |
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-II, B-III, C-IV, D-I
Each pollutant is matched with the part of the body it chiefly harms.
(A) Lead — this matches (II) Brain. Lead from old paints, batteries and leaded petrol is a nerve poison; it damages the brain and lowers learning ability, most of all in children.
(B) Mercury — this matches (III) Stomach. Mercury salts taken in with food or water are corrosive to the stomach and intestines, and mercury builds up in fish eaten by people.
(C) Carbon monoxide — this matches (IV) Nerves and arteries. It binds with haemoglobin far more firmly than oxygen does, so the blood carries less oxygen; the heart, blood vessels and nervous system suffer first.
(D) Asbestos dust — this matches (I) Lungs. Its fine fibres lodge in the lungs and cause asbestosis and lung cancer.
Tip: Asbestos and the lungs is the surest pair; only Option (2) has D-I, so it settles the question at once.