The correct option is A Black rot and shoot borer, respectively
PusasnowballK−1
Pusasnowball K−1 is a variety of cauliflower that is resistant to Black rot.
Black rot is a prevalent bacterial disease in crucifers caused by the pathogen Xanthomonas campestris. The pathogen initially attacks the leaves. The infected tissue shows wilting and the colour changes from pale green to yellow to finally brown and thereafter it dies.
Pusa A−4
Pusa A−4 is the okra variety, resistant to shoot borers. The shoot borer larvae attack during vegetative stage of the plant. It mainly attacks the stem and results in damaging shoots.