Mumbai

IIT, Mumbai is the best option.

You can check the below mentioned link for more details:
http://www.kulguru.com/colleges/master-of-business-law-mbl/maharashtra/mumbai
Good luck.

You can think about pursuing MBA as it will fetch you a good scope in the field of management.

No B School can ever guarantee 100% placement. Bombay has 7 B-Schools which are in first 30 ranked MBA colleges in India. You may refer to link https://www.shiksha.com/mba/ranking/top-mba-colleges-mumbai-all/2-0-0-10224-0 for further details. If you do MBA from these colleges, you have very high chances to get a very good job and jump start to an excellent corporate career.

Hello Asif Raza,
It depends on you, but I will suggest you should opt for mechanical engineering because it is an evergreen field. Aeronautical also has a good scope, but it doesn't have much demand as compared to mechanical engineering. Mechanical engineering has more scope for future. In future, you can move opt for Masters in aeronautical engineering.

The best colleges to pursue B.Sc in mathematics are:
1. St. Xaviers College
2. Elphinstone College
3. Ramnarain Ruia College
Lots of career options are open for you, but you should be careful, and select the course as per your interest. Please do not give priority to any other factor than your own interest. Here are few options for you:
1. M.Sc (if you are interested in teaching)
2. MCA
3. MBA
4. Any other competitive exam for jobs like admin, services, banks, etc.
According to me, you should meet a good career counselor for personality and interest psychometric test. Apart from your personality test.

Wedding planning is a part of event planning. The best institute to get into is National Institute Of Event Management.

You will have to check with private colleges as admissions in good and government colleges are mostly closed by now.