Hi! Hope You are doing well! YES anyone body from other state can apply for the TNEA . The minimum Criteria is that you should have passed 12th with 50 marks in Physics, Chemistry and also Maths & 40 for ST candidates..
please go through following link for further information..
https://www.google.co.in/amp/s/engineering.careers360.com/articles/tnea-for-other-state-students/amp all the best!
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