You can apply for re-admission in a different college than the one you discontinued from for 2nd PUC Science.

Colleges typically allow students who discontinued studies to re-apply through their general admission process. However, re-admission depends on the availability of seats in the desired college for your stream (Science in this case). There might be limited seats compared to fresh admissions. You need a Transfer Certificate (TC) from your previous college to apply for re-admission elsewhere.

I hope it helps!