Colleges in Tamil Nadu

Yes, VIT offers B.Tech in mechatronics.

Yes, you should wait for the result. By the way, you got decent rank in VIT. You will get CSE with this rank in VIT University.

Prefer Anna University, as it has good reputation and name for several courses. Second option, you can keep for PSG. Anna University is top in Tamil Nadu.

The better one is VIT-Vellore because it is widely preferred by the students for B.Tech and CSE. SRM is also good but if you get VIT go for it.
Both are good but the fee structure is a little high as they are private universities.
Salary packages depend on the candidate's skills and also the companies

Yes, SRM offers B.Tech in mechatronics.

Yes, it is a good one, but the fee structure could be high as it is a private university.
Placements are good. SRM University main campus is mostly preferred.
Select a good course as many core companies will be coming.
All the best.

Dear Kishore,
It's up to your and skills, of course, you can get good salary packages after doing M.Tech & B.Tech dual degree courses. I would suggest you to choose CSE branch.

Right now,
You are not late.
You can join easily.
If you think about lateral entry, then they charged more donation.

VIT is a slot based system, so according to your rank, they divide you into the respective slots. There are 4 slots, each different in the fees. So, the rank of 1 to 20000 come in the first slot with scholarships, so probably you will get any branch in VIT, but it all comes down to the fees which Yo

24000 is actually a very good rank. So, you can get Hemicak Engineering in VIT Vellore.