Which of the following statements is true regarding the center of origin of plants?

Match the following:

Column-$I$	Column-$II$
$(1)$ Wheat	$(p)$ Taichung Native-$1$
$(2)$ Rice	$(q)$ Sonalika and Kalyan Sona
$(3)$ Sugarcane	$(r)$ Hybrid maize,jowar and bajra
$(4)$ Millets	$(s)$ Saccharum officinarum

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 ........$(iv)$ ........

From which species was resistance against $Phytophthora$ in potato obtained?

Which of the following is a green manure?

$A$ combination between an open-pollinated variety and an inbred line is called: