The correct option is C Inter-generic
There are several methods of breeding by which we can incoporate various desirable characteristics like disease resistance, response to fertilisers, product quality and high yields.
Hybridisation is one of the ways to achieve this. It can be done in several ways.
1. Inter-varietal: Breeding/crossing between two different varieties of crop.
2. Inter-specific: Breeding between two different species of same genus.
3. Inter-generic: Breeding between two genera.