I would like to know that how long one has time for drop off of the visa after clearance for visitor visa

Impossible to say without more information. But why wouldn't they just start trying to get the visas as soon as possible, rather than waiting until...

Can my fiance become a citizen if we get married if he has one felony drug related charge?

There's a lot going on here. In theory, the answer is 'yes,' especially if the felony is dated (more than 5 years). However there could be several...

I am going to marry to my boyfriend who is a green card holder. Can I apply for green card after we get married?

Yes. But this could take several years if you are outside of the US.

What is the criteria for applying for US citizenship?

Possibly. He may be subject to a 3 or 10 year bar, unless he qualifies for a waiver. Are the children citizens? Perhaps one could sponsor him as...

Can I get my visa before September 30th after being 10 months under administrative processing (DV 2013 winner) ??

There's really not enough information here and it would be difficult to guess at exactly what the issue causing the delay is. But this doesn't...

Requesting POE officers to allow entry using H1 instead of AP.

The H-1B is no longer appropriate; use AP

How old are you? You may be able to be brought in as a substitute sponsor if you meet certain criteria.

Hello, What is the right way to get a work authorization?

There is no right way. On an F2, you can't get work authorization. You'd need to try to qualify for another type of visa.

B2 holder decided to apply for F1 in a US embassy, what are the questions will be and documents he need for his interview?

No. You don't need a job. In fact, if you are in the US - you would not be able to hold a traditional salaried job while in either visitor or...

What is the best course of action after denial of K1 visa?

You could possibly seek reconsideration of the decision. Alternatively, you could re-file or marry elsewhere. However, given the prior denial, you...