Virus free plants can be generated through-

Cocoa is the plant from which chocolate is made. Which part is used to extract it?

Assertion : In case of vegetatively propagated crops, pure-line selection is not required.

Reason : Hybrid vigour is mostly used in vegetatively propagated plants.

Triticale is the first man-made cereal crop. Mention the type of hybridisation through which it was produced.

The viability of seeds is tested by

Assertion : Use of fertilizers greatly enhances crop productivity.

Reason : Irrigation is very important in increasing crop productivity.