Hello Aspirant,

Mostly the only option under science field ,without any entrance exam is B.Sc in a subject of your interest like physics,chemistry,zoology,botany etc and engineering .Engineering admission in some states are based on only 12th score, they will conduct general counselling and you will be allotted seat based on your rank. For B.Sc, some universities may conduct entrances and  some will accept based on 12th merit, so you will know only by visiting the official website of the college. And may be some paramedical courses occupation therapy, BPT,radiology, nutrition and dietetics etc in some states might be accepted based on 12th merit. It varies from state to state,from university to university , so you have to search and see according to your preferences.

In case you are looking for medical courses without NEET,then visit the below link:

https://medicine.careers360.com/articles/medical-courses-without-neet

All the best