Match List I (Water pollutants) with List II (Examples) and choose the correct answer from the options given below.

List I

i.Inorganic chemicals

ii.Organic chemicals

iii.Radioactive materials

iv.Pathogens

List II

a.Iodine

b.Detergents

c.Parasites

d.Salts

Ai-b, ii-d, iii-a, iv-c

Bi-b, ii-a, iii-c, iv-d

Ci-a, ii-d, iii-b, iv-c

Di-d, ii-b, iii-a, iv-c ✓ Correct

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

Explanation

Inorganic chemicals in water include dissolved salts such as chlorides and sulphates.

Organic chemicals include synthetic detergents that foam and resist breakdown.

Radioactive materials include isotopes like iodine released from nuclear activity.

Pathogens include parasites along with bacteria and viruses that cause disease.

Matching each class to its example gives inorganic-salts, organic-detergents, radioactive-iodine, pathogen-parasites.

The same water can carry several pollutant classes at once, needing combined treatment.

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