In artificial hybridization,emasculation and bagging techniques are useful for:

Emasculation is related to

Given below are the events that are observed in an artificial hybridization programme. Arrange them in the correct sequential order in which they are followed in the hybridisation programme. $(a)$ Re-bagging $(b)$ Selection of parents $(c)$ Bagging $(d)$ Dusting the pollen on stigma $(e)$ Emasculation $(f)$ Collection of pollen from male parent.

Give scientific reasons: Artificial hybridisation is one of the major approaches of crop improvement programme.

$A$ : Air layering does not produce a composite plant.
$R$ : Stock and scion are fused to form a composite plant during grafting.

Emasculation and bagging are useful for