Science

For lecturer, you need to be an M.Sc. Also, you need to clear NET/SET. After B.Ed, you can teach at + 2 levels.
If you want teach in schools up to +2, you can go for B.Ed and then you have to clear TET conducted by states or the center.

There are many good engineering institutes you can look for like SRM, Satyabhama, Anna University.
Check the below link:-
https://www.shiksha.com/b-tech/ranking/top-bio-technology-colleges-in-chennai/54-2-0-64-0

B.Sc in aviation pass outs can do various roles such as- mechanic (aircraft design, manufacturing and maintenance), pilot, flight attendant, air traffic controller, cargo manager and airport ground operations manager.

Good. It seems you have a great interest in music.
I would suggest you do further studies from media schools from where you will get recognition and placement within the industry.
for eg : ZIMA mumbai, Film institute pune, symbiosis pune and many many more.
yes so go for it.

She should take up B.Sc Zoology and then M.Sc Zoology - she can this way go for teaching in colleges.
The minimum level of education required for college professors is a Master's degree, which can qualify an individual for work as a professor at a community college. A doctoral degree is typically required to work as a full-time, tenure-track university professor. For this she can further go for PhD.

Hi,
Yes, you can do psychology as an undergraduate program. The option available to you is BA in psychology. The best colleges in India are:
Christ College, Bangalore
Fergusson College, Pune
Jesus and Mary College, Delhi
Jai Hind College, Mumbai
St. Xaviers College, Ahmedabad
Loreto College, Kolkata
Presidency College, Chennai
Mithibai College Mumbai
You'll get admission on the basis of your class 12th marks.

To do B.Sc in maths, you need at least 55% in maths in class 12th.