In which type of plants is emasculation not required?

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

To ensure that only the desired pollens fall on the stigma in artificial hybridization process:
$(a)$ The female flower buds of a plant producing unisexual flowers need not be bagged.
$(b)$ There is no need to emasculate unisexual flowers of the selected female parent.
$(c)$ Emasculated flowers are to be bagged immediately after cross-pollination.
$(d)$ Emasculated flowers are to be bagged after the removal of anthers.
$(e)$ Bisexual flowers showing protogyny are never selected for cross.
Choose the correct answer from the options given below:

The process of removal of anther from the flower bud before it dehisces is called as

For a successful graft,the adhesion between stock and scion is a must. Which one of the following is the earliest event towards a good graft?

Choose the appropriate option regarding the $Bagging$ technique.