Hello sasidhar,

Anna university have adopted the TNEA 2018 eligibility criteria for all the candidates applying for the btech course offered by Tamil nadu colleges. Minimum Percentage required is 50% to get admission for general category and for obc it is 45% and for SC,ST it is 40%. To get all the detailed TNEA eligibility criteria 2018 i will provide you a link below- 

https://googleweblight.com/i?u=https://engineering.careers360.com/articles/tnea-eligibility-criteria&hl=en-IN

All the best