I applied B-1 visitor visa 6 months ago and US Embassy Approved it. I went to US for a month last dashain on B-1 visa and now back to Nepal.

Now I am trying to apply F-1 Student visa. If they reject my F-1 application, What will happen to my current B-1 visa.

Will they reject/revoke my existing B-1? Does it depend on per case basis or there is some general rule on it?