Electrical and Communications Engineering

Hello Nandini,
For ECE or any other engineering courses, you will get the best engineering colleges with a cut off mark of 197.75.
The best engineering colleges that you can get are:
1) SSN, Kalavakkam, Chennai
2) MIT, Chennai
3) Thiagarajar College Of Engineering, Madurai
4) PSG Coimbatore
5) Sastra University, Thanjavur
These are all the best colleges that you can get with your marks.
The first 5 colleges come under Anna University so that if you attend the counselling then you can get them.
For SASTRA University, you need to apply separately. They admit you in two streams:
Stream 1: JEE marks and board exam marks
Stream. 2: Only board exam marks.
The website for applying to Sastra University is www.sastra.edu and the last date is June 10.
The website for applying to Anna University counselling is www.annauniv.edu .
The last date of applying is May 31 and the last date for submission is June 3.
All the best!

As per your query, I would prefer either aeronautical or aerospace.
Aerospace engineering is concerned with designing and building aircraft and spacecraft. Aerospace engineering can be divided into two specializations: Aeronautical engineers handle design, manufacturing and maintenance of aircraft, helicopters & UAV etc. and astronautically engineers, who design spacecraft, rockets, satellites, and others. Aeronautical engineering was the original term for the field. Both, Aerospace Engineering and Aeronautical Engineers are niche branch of engineering with lot of similarities in syllabus with almost 90% overlap.
There are lots of good career opportunities on completion of Aeronautical/ Aerospace engineering. You can join DRDO/ ISRO/ Aviation manufacturing or its ancillary units/ Airlines/ Air Force/ Educational Institutes/ R&D Units / IT etc.
Even after B.Tech Electronics and communication , Mechanical and telecommunication programme you can opt M.Tech aerospace.