Delhi

Dear Aayu Patel,
The first priority should be Jaipur then Hyderabad followed by Ahmedabad, Pune, Mumbai, etc. You should prefer to take coaching in Jaipur apart from that TIME, Career Launcher and IMS are the best options for the CAT coaching.
All the best.

IGNOU is the best option, other universities are also there like Sikkim Manipal, Annamalai and Madure Kamraj.

Hi,
There is no clear guideline from UGC or AICTE for the Distance mode B.Tech programme. So, for the safer side, you must plan your education especially in engineering (B.Tech) programme in regular mode only from a recognized university or institute.
Through regular mode you would knowledge, practical experience, interaction with companies and guidance from faculties.

Hi,
You may refer to following links for list of aeronautical engineering colleges in NCR and Bangalore:
https://www.shiksha.com/b-tech/colleges/b-tech-in-aeronautical-engineering-colleges-delhi-ncr
https://www.shiksha.com/b-tech/colleges/b-tech-in-aeronautical-engineering-colleges-bangalore

Hi,
In today's time most of the business schools have global approach to equip their students well. Check the following link to see what is offered by FMS:
http://www.fms.edu/?q=node/14

Hello Amit,
AIT is a quite good institute. IPU is a good option too. It's a tough decision but be advised that both are good and you would not regret any decision.
Best wishes.

Yes, you can very well go for BA after science in 12th. Check the below link for colleges offering BBA-
https://www.shiksha.com/bba/colleges/bba-colleges-delhi-ncr

TIME is the most popular amongst students followed by IMS.
I am not sure about MBA Guru.