Dear Raveendranath,

Yes , There are lots of reservation under TNEA.

Here are the informations.

The servicemen reservation is divided in 5 parts (A,B,C,D and E).

Ex-servicemen reservation is come under 'a' catagory it is also called code number.

The total number of seats in TNEA for ex-servicemen is 150 seats.

For more details click here: https://engineering.careers360.com/articles/tnea-seat-reservation

Thank you!