Match List I (Types of water pollutant) with List II (Example).
List I
i.Disease Causing Agent
ii.Oxygen Consuming Waste
iii.Plant Nutrient
iv.Suspended Solids
List II
a.Fine particles of clay
b.Coliform Bacteria
c.Animals and Plants in aquatic habitat
d.Phosphorous
Ai-b, ii-c, iii-a, iv-d
Bi-b, ii-c, iii-d, iv-a ✓ Correct
Ci-a, ii-b, iii-c, iv-d
Di-a, ii-b, iii-d, iv-c
Correct answer: (B) i-b, ii-c, iii-d, iv-a
Explanation
Correct matching links disease agents with coliform bacteria, oxygen-consuming waste with aquatic animals and plants, plant nutrients with phosphorus, and suspended solids with fine clay.
Coliform bacteria are disease-causing agents indicating contaminated water.
Dead animals and plants in the water are oxygen-consuming organic waste as they decay.
Phosphorus acts as a plant nutrient that feeds algae and weeds.
Fine particles of clay stay suspended and cloud the water as suspended solids.
Excess plant nutrients like phosphorus drive eutrophication in lakes.
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