Hello aspirant!!

You can apply for the bds in tamilnadu if you study 10+2 with physics, chemistry and biology as your main subject. If you are not able to apply it may be due to some technical issues other than that there would not be any reason. Don't get worried. You will be getting anseat in bds college.

If you want to know best bds colleges in Tamil Nadu kindly refer to the following link below....

https://medicine.careers360.com/colleges/list-of-bds-colleges-in-tamil-nadu

All the best!!

Stay safe!!