Choose the correct option.​

Statement 1: Wheat leaf rust affects citrus plants.​
Statement 2: Yellowing of veins and stunted growth are the symptoms of yellow vein mosaic disease.

Q. In plants, mosaic formation, leaf rolling and curling, yellowing of plant parts, vein clearing, dwarfing and stunted growth, necrosis etc. are the symptoms of

Q.

Name the causative micro-organisms of the following plant diseases :

(a) Rust of wheat (b) Citrus canker (c) Yellow vein mosaic of bhindi (Okra)

Q. Match the following columns and select the correct option.

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A.}& \text{Wheat leaf rust}& 1& \text{Grapefruit}\\ \text{B.}& \text{Citrus canker}& 2& \text{Okra}\\ \text{C.}& \text{Yellow vein mosaic}& 3& \text{Barley}\end{array}$

Q.

What is the mode of transmission of the following diseases ?

(a) Rust of wheat ( b) Cirus canker (c) Yellow vein mosaic of bhindi (Okra)