Question

IR 20 and Ratna are two important varieties of
A. Paddy
B. Jowar
C. Bajra
D. Wheat

Answer 1

Hint: Ratna was developed in the wake of the green revolution that took place in India. It was developed in 1966. The main cultivation centre of Ratna is West Bengal because of its favorable environmental condition. IR 20 is considered a high yielding variety.

Complete step by step answer:
Jowar is the crop which is grown in dryland agriculture. Jowar originated in India and Africa. Over time, improved and hybrid varieties of Jowar came into existence. Improved varieties are SPV-462, CSV-13 and CSV-15.
Bajra is coarse grain cereal which is suitable for cultivation which receives a good amount of rain as well as dry land. It is regarded as a Kharif crop. Most important hybrid varieties of Bajra are NBH5863, NBH5900 and NBH5922.
Wheat cultivation dominated the northern region of India. Haryana and Punjab of northern plains in India are the highest producers of wheat. Some of the varieties of wheat which are grown in India are VL832, VL804, HS365.
Rice breeding programme was initiated by Dr G. P Hector in 1911 in the region of Bengal. Before the establishment of the Indian Council of Agricultural Research (ICAR) in 1929, Madras and Bengal dominated rice crop production. In India, more than 1200 varieties are considered ideal for different ecosystems. Around 128 varieties are contributed by NRRI, Cuttack. Some of the varieties of rice are Padma, Ratna, IR 20, Kiron, Krishna, Vijaya, Saket 4, Jayanti, Kalinga I, Kalinga II, Shakti.
So, the correct answer is Option D.

Note: Ratna and IR 20 fall in the category of rice. Ratna was developed during the wake of the green revolution in India in 1966. The main cultivation of Ratna is West Bengal due to the favourable environmental condition. IR 20 is considered a high yielding paddy.