Want to apply for F1 visa but have record of previous B1 visa

[janeaustin08]

So, I had previously applied for a B1 visa through my previous employer for a client visit. The visa was approved and I was given a visa for 3 months. Unfornutaley, I didn't get to travel that time because the client changed their mind later. The validity of my B1 visa has already expired.

Now, I want to apply for an F1 visa for my postgraduate studies.
Will there be any chance of my F1 visa rejection because of my previous B1 visa which was approved but I didn't travel to the USA that time?

Please give me some insights on this and possible questions that the consular might ask regarding this. Will be a big help. Thanks.