Pusa Sem 2 is a variety of ___A___ which is developed by ___B____.

The correct option is D A: flat bean, B: IARI
Agricultural pests are organisms that attack agricultural crops and destroy them, leading to huge crop losses. Developing pest resistant crops can provide a permanent solution to this problem and is one of the major objectives of the plant breeding programmes in India.

Pusa Sem-2 is an improved variety of flat bean. It is resistant to jassids, aphids and fruit borers. Jassids and aphids are sap sucking insects. Fruit borers infest the pod of flat bean.

Pusa Gaurav is a pest resistant variety of Brassica (rapeseed mustard) which is resistant to aphids.

Pusa Sawani and Pusa A-4 are pest resistant varieties of okra (bhindi) that are resistant to stem and fruit borers.

All these Pusa varieties have been developed by the Indian Agricultural Research Institute (IARI).

CDRI stands for Central Drug Research Institute which is located at Lucknow. This institute is primarily involved with drug research.

NDRI or the National Dairy Research Institute is involved with dairy research.