As she is married to a LPR holder in the USA and has a pending I-130, its doubtful that a F-1 would be approved.
To get a non-immigrant visa you have to prove that you do not intend to remain in the USA, and have strong ties to your home country. If your husband lives in the USA and is applying for a Green Card for you, you're going to have a tough time proving that!Is she eligible or not ( by law)?