Match List I (Particulate matter term) with List II (Explanation) and choose the correct answer from the options given below.

List I

i.Aerosol

ii.Nano particles

iii.Smoke

iv.Fine particles

List II

a.Particles formed by incomplete combustion with a mixture of carbon volatiles

b.Particles with size less than 2.5 micrometre

c.Particles with size less than 0.2 micrometre

d.Any solid or liquid particle suspended in air

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

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

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

Di-d, ii-c, iii-a, iv-b ✓ Correct

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

Explanation

Each particulate term matches the description that fits its size or origin.

An aerosol is any solid or liquid particle suspended in air.

A nano particle is one smaller than about 0.2 micrometre.

Smoke is made of particles from incomplete combustion mixed with carbon volatiles.

A fine particle is one smaller than 2.5 micrometre.

Fine particles below 2.5 micrometre, known as PM2.5, reach deep into the lungs.

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