Match the following options correctly:

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

The correct answer is Option 4: (a)- iii, (b)- iv, (c)- ii, (d)- i

(a) Water pollution → (iii) Diarrhoea. Water pollution is associated with water-borne diseases such as diarrhoea due to contaminated drinking water.

(b) Dharavi → (iv) Located in Mumbai. Dharavi is a densely populated area located in Mumbai.

(c) Air Pollution → (ii) Acid rain. Air pollution caused by gases like sulphur dioxide and nitrogen oxides leads to acid rain.

(d) Jhabua → (i) Located in Madhya Pradesh. Jhabua is located in Madhya Pradesh.