Match the following plant diseases with their symptoms.
$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \left(a\right)\text{Fungal disease}& \left(i\right)\text{Roots have rotted and emit a foul smell.}\\ \left(b\right)\text{Tikka disesase}& \left(ii\right)\text{Discolouration of parts of the plant.}\\ \left(c\right)\text{Viral disease}& \left(iii\right)\text{Leaves and stems have spots and scars.}\end{array}$

The correct option is A a - iii, b - i, c - ii
Diseases in the plants are mainly caused by bacteria, fungi and viruses.
(a) Fungal diseases - They leave a white, black, yellow, brown spots or a fluffy or powdery coating on leaves. Ring worm is a fungal infection which produces red and itchy patches in outer skin of humans.
(b) Tikka disease - It mainly effects the roots and leaves of the plant leaving spots on them. It leads to the rottening of the roots which results in release of a foul smell.
(c) Viral Diseases -They primarily lead to the discolouration of the leaves of plants.