Match the following pollution types with the various pollutions involved correctly:

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

The correct answer is option 3: (a)- iv, (b)- iii, (c)- ii, (d)- i

(a) Air Pollution → (iv) Oxides of Sulphur and Nitrogen. Air pollution is caused by pollutants such as sulphur oxides (SOx) and nitrogen oxides (NOx), which are released from industries, power plants, and vehicles.

(b) Water Pollution → (iii) Odour, dissolved and suspended solids. Water pollution is characterized by undesirable odour and the presence of dissolved and suspended impurities that degrade water quality.

(c) Land Pollution → (ii) Human and animal excreta, viruses and bacteria. Land pollution results from the improper disposal of solid wastes, including human and animal excreta, which can contain harmful microorganisms.

(d) Noise Pollution → (i) High levels of sound above the tolerance level. Noise pollution occurs when sound levels exceed the permissible or tolerable limits for humans.