ARMY ROTC DIS-ENROLLMENT?

I'm currently in the process of being dis-enrolled from ARMY ROTC, and I've requested the Active Duty Option. The ADO would require a four year minimum of service, which I am willing to accept with no reservations whatsoever. I fully understand that my packet goes up for review before a board & the final decision relies on them, with the other option being repayment of funds. Is it possible after being selected to serve the four year active duty to serve it in a branch other than the Army seeing how that's who the scholarship was through?