With regards to the assertion and reason, choose the correct option.
Assertion: In case of vegetatively propagated crops, pure line selection is not required.
Reason: Hybrid vigour is a property of vegetatively propagated plants.
In case of vegetatively propagated crops, pure line selection is not required. Pure line selection is useful only for sexually reproducing plants. Vegetatively propagated plants will be similar to the parent.
Hybrid vigour is property of hybrids, that are produced by crossing plants with different traits, such that the progeny obtained is of a superior quality. Vegetatively propagated crops are clones of the parents because they do not involve sexual reproduction and hence do not show hybrid vigour.