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Match List - I with List - II : List – I (compound) (a) Carbon monoxide (b) Sulphur dioxide (c) Polychlorinated biphenyls (d) Oxides of Nitrogen List – II (effect/affected species) (i) Carcinogenic (ii) Metabolized by pyrus plants (iii) Haemoglobin (iv) Stiffness of flower buds Choose the correct answer from the options given below :

1. (a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)
2. (a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)
3. (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)
4. (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)

Correct answer: (a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)

Solution

Carbon monoxide affects haemoglobin by binding to it, sulphur dioxide is known to have carcinogenic effects, polychlorinated biphenyls are harmful and can be metabolized by certain plants, and oxides of nitrogen can lead to stiffness in flower buds.

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