Hey.
To be eligible to take admission in Government or any medical colleges through NEET you need to pass class 12th board exams and also score a minimum aggregate of atleast 50% marks in Physics, Chemistry and Biology subjects in your 12th boards  to be eligible. Other than that for admission through JIPMER entrance exam in the two JIPMER Institutes you also need to score a aggregate of 50% at least. But for admission in any AIIMS colleges through AIIMS entrance exam you need to score a minimum aggregate of atleast 60% marks in PCB subjects together and also pass class 12th board exams to be eligible.
Best of luck

You have to score atleast 60 percent marks in your 12th standard to be eligible for MBBS.

For further details you can take help from the below mentioned link:-

https://medicine.careers360.com/articles/aiims-mbbs-eligibility-criteria

Good Luck