Hi, arif.

Neet is an all India common entrance examination for the medical aspirants to get into the undergraduate courses in both government and private colleges. 

For the clearer answer for your questions, please mention your category, as they also may change your admissions into colleges.

For a general category student the minimum marks required is more than 

530 for government medical colleges 

510 for government dental Colleges

450 for private medical colleges

For more details please check the link below

https://www.google.com/amp/s/medicine.careers360.com/articles/neet-cutoff-assam/amp

Goodluck