The plant dye henna imparts orange-red colour to skin and hairs due to its reaction with which of the following?

The anti-malarial drug quinine is made from a plant. The plant is

A. Neem

B. Eucalyptus

C. Cinnamon

D. Cinchona

The causal organism of black stem rust of wheat is

A. Xanthomonas compestris

B. Pseudomonas solanacearum

C. Puccinia graminis tritici

D. Albugo candida

Match List-I with List-II and select the correct answer:

A. a-2, b-1, c-4, d-3

B. a-1, b-4, c-3, d-2

C. a-4, b-3, c-2, d-1

D. a-3, b-2, c-1, d-4

Which one of the following plants is used for green manuring in India?

A. Wheat

B. Sunhemp

C. Cotton

D. Rice