The main aim of plant breeding is

Sugarcane grown in which region of India has a thicker stem and higher sugar content?

One of the popular methods employed in the production of new varieties of plants is

Assertion $A :$ Improved varieties with genetic variations can be obtained through plant breeding.
Reason $R :$ The main objectives of plant breeding are the same as those of animal breeding.
Which option is correct for Assertion $A$ and Reason $R$?

Which is the oldest method of plant breeding for crop improvement?

$A$ and $B$ were crossed to obtain sugarcane varieties having desirable qualities and the ability to grow in the sugarcane areas of North India. The most appropriate option for $A$ and $B$ is: