what is the eligibility for bpt 2019 ? is it 50 percentile in neet like mbbs/bds?

You should complete your 10+2 with a minimum aggregate of 50%. This aggregate changes from University to University. Because the admissions are at University level, it solely depends on the aggregate decided by the University. You should have studied Physics , Chemistry and Biology/Biotechnology as your core subjects in your 10+2.