Which crop variety was developed by Norman Borlaug?

The steps of a plant breeding program are given below. Arrange them in the correct sequence.
$(a)$ Cross-hybridization among the selected parents
$(b)$ Testing,release,and commercialization of new cultivars
$(c)$ Collection of variability
$(d)$ Selection and testing of superior recombinants
$(e)$ Evaluation and selection of parents

Fill in the blanks in the following statements ($A$ to $C$):
$(A)$ The capacity to generate a whole plant from any cell/explant is called ......$(i)$ .......
$(B)$ The transfer of resistance genes occurs through ........$(ii)$ ........ . Subsequently,......$(iii)$ ....... occurs between the target and the source plant.
$(C)$ The rice variety $IR8$ was developed in the country ........$(iv)$ .

New varieties of plants are produced by ..........

The hexaploid wheat species from which modern types of wheat have been developed:

In maize,hybrid vigour is exploited by