This query was already answered before
You are just shooting blind shots without reproducing what is exactly stated in the Will
B cannot become an executor just because A died
It all depends on the exact wordings of the Will
I had already given my view based on your previous query
It is only when A refuses to act as an executor or if A is unavailable due to him being out of India for a long time, that B can become an executor
The Will does not say (as the per the limited information given by you in your previous query) that if A dies then B shall assume the role of an executor
So you need to show the Will to a lawyer of your choice for him to advise properly
Asking vague questions like this won't help
If B cannot become an executor then any legatee named in the Will can apply to the court for being appointed as an administrator for administering the estate of the deceased. For that a LA petition with Will annexed has to be filed. The other legal heirs of the deceased have to give their consent for such petition
The court fee having already paid on the probate petition, fresh court fee on the LA petition will not have to be paid, except a nominal fee as per schedule 2 of the Maharashtra court fees act