Hello aspirant
There are a lot of job opportunities after BS MS from IISER. These are given below:
1. PHD - after completing your BS MS from IISER you can do PHD then you can get a job CSIR labs, university or research labs as a staff scientist or principal invigilator.
2. Teaching - After getting your degree from IISER you can go for teaching sector in school or university after clearing the qualifying exams like NET, B.Ed. etc.
3. Government jobs - you can prepare for UPSC, SSC etc exams.

Best degree from IISER is a relative term. It will totally depend on a person interest. You can choose chemistry, biology, mathematics, physics. So it will totally depend on your interest.
Hope this helps

IISER Mohali

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