The correct option is C Both A & B
The mung bean varieties, resistant to yellow mosaic virus and powdery mildew were developed by induced mutations. Powdery mildew is a fungal disease that affects many plants and the fungus grows well in humid environments. Mungbean yellow mosaic virus is a plant pathogenic virus. Of the various viral diseases inflicting legume crops, mungbean yellow mosaic disease is one of the most destructive and widely distributed.