B.Tech

https://www.shiksha.com/resources/college-comparison
This may help.

These are top 10 colleges through COMEDK exam for CSE and IT:
1. RVCE
2. MSRIT
3. PES, SOUTH CAMPUS
4. BMSIT
5. BIT
6. SIR MVIT
7. SIT, TUMKUR
8. NIE, MYSORE
9. Kle Technological University
10. SJCE.

Hi,
With 30k rank it's tough to get admission in ECE of Acharya Branch, however you may get it in 2nd round or extended round of counselling.

Hello,
Eligibility criteria for B.Tech in mechanical engineering is that a student have must passed 12th board examination with physics, chemistry and mathematics (PCM) and also need to qualify the state level entrance for JEE Mains/WBJEE.

Hi,
Check this link you will get your answers.
https://www.delhidegree.com

Hi,
CSE and ISE branch are almost same, you can go with ISE in these colleges:
1. BMSIT
2. BIT
3. NIE, MYSORE.

With these marks, there is no chance to get admission in any government college like NIT or GFIT. With these marks, your general rank will be up to near INR. 7 lakh and at this rank you will not be able to get admission in government college. But, I will give you a suggestion to get admission in best state government college of India, if you give the paper of JEE mains and secured rank up to INR. 5 lakh and class 12th percentage is good, then you can take admission in any government college by state counselling hope you understand.
I hope this will help.

I am attaching a link that will predict college for you based on your performance in JEE Mains exam. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Best wishes to you.

GNOIT is a good option, but it all depends on the campus. So, go according to the campus provided to you.