Hello Jaya

There are many good institutions in Tamil Nadu for BSc. Computer Science. However, here are the top institutions in Tamil Nadu which you can choose from for studying the course:

1. Loyola College, Chennai, Tamil Nadu
2. Women's Christian College, [WCC] Nagercoil, Nagapattinam, Tamil Nadu
3. Ethiraj College for Women, Chennai, Tamil Nadu
4. St. Joseph's College, Tiruchirappalli, Tamil Nadu
5. Bishop Heber College, Tiruchirappalli, Tamil Nadu
6. Sri Ramakrishna College of Arts and Science, Coimbatore, Tamil Nadu
7. Sri Krishna Arts and Science College, Coimbatore, Tamil Nadu
8. Dr. NGP Arts ans Science College, Coimbatore, Tamil Nadu
9. Nirmala College for Women, Coimbatore, Tamil Nadu
10. Rathinam College of Arts and Science, Coimbatore, Tamil Nadu

Good Luck!

Hope this was helpful.