Crop improvement is possible through

The correct option is A Judicious combination of selection, introduction and hybridisation

Option A is correct.

Crop improvement is possible through judicious combination of selection, introduction and hybridisation. Seeds should be selected carefully to get the desirable result. Mass selection and Pure line selection are the two methods for selecting a crop. The seed is then hybridized by combining the selected parents with desirable genes to produce pure- breeding progeny superior in many aspects tothe parental types.