Hello
There are 26% seats reserved for BC category under TNEA 2019. I am mentioning previous year's closing ranks for different branches :

Aeronautical Engineering
163223


Automobile Engineering
163522


Biomedical Engineering
151533


Chemical Engineering
106726


Civil Engineering
163577


Computer Science Engineering
163567


Electrical and Electronics Engineering
163565


Electronics and Communication Engineering
163527


Mechanical Engineering
163574


Mechatronics Engineering
163526

For furthermore information please go through the link given below :

https://engineering.careers360.com/articles/tnea

I hope this would help you. For further queries please feel free to write me down in the comment box.