Yes,Definitely.
Your protection would be considered on merits of your aggregate performance and post preferences.
UPSC CSE and BPSC PCS exams are conducted by Central Government and State Government wherein the process and selection of candidates differ.
What post are you looking for?
Yes on the basis of Ex- service man and OBC category you would succeed to get selected provided what category and post are you seeking for competitive performance and results are the key factors to decide your next model of action and directions.