Why does the sawfly not select wheat?

The full form of $IRRI$ is ...........

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 plant source.
$(C)$ The rice variety $IR8$ was developed in the country ........$(iv)$ ........

In wheat,due to a specific type of stem,which of the following does not approach it?

Which one of the following combinations would a sugarcane farmer look for in the sugarcane crop?

The $....X....$ variety of Brassica is resistant to $.....Y.....$ disease.