Hello aspirant,
There are various courses that are offered for science after 12th-
1. You can do b.tech in any field like mechanical, CS, electrical, petrochemical, food processing etc.
2. You can give NDA exam if you want to go in army
3 you can join the Indian Navy or merchant Navy which is one of the prestigious jobs of the country.
4. You can do b.sc and m.sc in any field and take PhD for being a professor in government or private college.
5. If you want to become a forensic expert you can prepare that.
So these are some points in which you can make future.
All the best.
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