Hello,

All the competitive exams after 12th science should prefer PCM,  PCB,  PCMB criteria. In that case,  with the subject combination of Chemistry, Biology,  Nutrition and Computer Application you don't have the scopes to try JEE, NEET or ther ones.

But you can able to apply for the Hons. Courses in your preferable colleges and after the completion of your graduation you can able you appear for GATE,  NET or others one.

Hope for the best.

Thank you.