As far as I understood is you’re going to do bachelors of 3 years because you’re already doing diploma, it’s basically lateral entry for your further studies, so coming to your question, Candidates must have passed a degree/diploma/postgraduate degree of 4 years or 3+2 years (after 10+2 level).

Yes, you’re eligible, if your confusion persists, do reply again..!!

Yes Ram, you can attempt for the CEED but i will recommend you to go for it in the final year .