Dear S.MOHAN.KRISHNAN, here by I'm mentioning best colleges in TAMILNADU for bsc medical course

1. SRI RAMACHANDRA INSTITUTE OF HIGHER EDUCATION AND RESEARCH located in Chennai , having fee structure of 1Lakh
2. SRM INSTITUTE OF TECHNOLOGY located in Kanchipuram , having fee structure of 80,000
3. ANNAMALAI UNIVERSITY located in Chidambaram , having fee structure of 35,000
4. VINAYAKA MISSION UNIVERSITY located  in Salem , having fee structure of 60,000
5. HOLY CROSS UNIVERSITY (autonomous) located in Tiruchirappalli  , having fee structure of 50,000
6. GRACE COLLEGE OF HEALTYH AND MANAGEMENT  located in Kanyakumari , having fee structure of 100,000

this colleges will provide you admission on basis of your score in previous examination.