Hello Gowtham,
Based on the rank you have scored you definately have a chances to get an admission for CSE course in the best colleges. So, you need not worry about it. Make sure to apply for the counselling sessions. You can also go through this link for more details about the various college cut offs through TNEA, www.google.com/amp/s/engineering.careers360.com/articles/tnea-cutoff/amp.
Good Luck!
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