It depends on your category. If you are from UR category, 50% is the minimum marks in 12th to be eligible for NEET 2019. If you are from OBC/SC/ST it is 45%. 

For more details, you can check the link below:

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

Good Luck!

Sorry but u can go for other courses,u can get the details from my insta krs201998

Hii
The eligibility criteria for appearing in neet is that you should have 50% aggregate in pcb if you belong to a general category and if you belong to a obc/sc/st category then you should have 40%aggregate in pcb .I hope this information helps you.
Thank you