Hello
You can easily apply for all the exams specified by you like IIT JEE, AIIMS and NEET.  Since you have completed your 10 and 12 from India. So you can easily apply for them.
That is one of the basic eligibility criteria for the exams.
All the best
Prepare well and stay updated with the syllabus.
Hope it helps

Dear aspirant,

Yes you can apply for all the exams you've specified above. See your plus poinr is that you;ve doen your 10-12 here and that's all that is needed for you right now.

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

https://medicine.careers360.com/articles/neet-eligibility-criteria

The above two links are for jee and neet

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