Which semi-dwarf variety of plant was developed by Nobel laureate Norman $E$. Borlaug?

Which of the following statements are correct regarding the methods of breeding for disease resistance?

The synonym of pureline selection is:

Given below are the steps involved in a plant breeding program. Identify the correct sequence of these steps.
$i$. Collection of variability
$ii$. Hybridization
$iii$. Evaluation and selection of parents
$iv$. Testing,release,and commercialization of new cultivars
$v$. Selection and testing of superior recombinants

In the area of plant breeding,it is important not only to preserve the seeds of the variety being cultivated,but also to preserve all its wild relatives. Explain with a suitable example.

In $1960$,the wheat production revolution in India was made possible due to which of the following?