There are a total of 100 seats, 84 seats sponsored and 16 open. For the sponsored seats you need to qualify NEET and fulfill certain criteria belonging to a community. In the open category, it will be filled based on NEET scores pan- India by Directorate of Medical Education, Tamil nadu.

There is no fixed seats for any state like Andhra Pradesh. You need to compete country wide.

For more info

https://medicine.careers360.com/articles/cmc-vellore-mbbs-admission