Hello Gourab,

It would be great if you could tell me your category. For UR Category the minimum qualifying percentage required for UR Category is 50%, for OBC/SC/ST is 40% and for PWD is 40%. Please remember that the minimum aggregate marks is only for PCB subjects.  I would be able to give you more specific information, if you could tell me your category.
I hope this has answered your query.

Minimum 50%aggregate marks in PCb subjects in 12th if in General category is must.

Forbother category like SC and ST and OBC you need 40% and for PwD category you need 45%.

Exhaustive eligible criteria below 

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