India

Yes, Doon business school is best.

Kindly refer this link, hope you would get some help:-
http://www.bestindiaedu.com/distance-learning/courses/master-international-business.html All the best.

U can go for indraprast college , janhit college in gr. noida and many more affilated to ccs university with low fees

With 400 marks its difficult to get into government run medical colleges if you belong to BC. you may get private colleges.
All the best. Feel free to revert

You didnt mentioned your profession, weather you are student or working , your timings etc.so its hard to help you in preparing time table.But I would like to share one important message that early morning especially 5.30-7 AM is the best time for study. This is the time when our positive energy and mind is in peak. So we can store many things in our mind easily.
After sun set, our body may be week need relaxation. So try to follow this, I am sure you will find the difference
all the Best

In india you will need b.a english for master's. Abroad you have to take GRE and then you may apply as it has verbal reasoning and ability as one of its component.

Aeronautical Engineering has good scope in India. AE Graduates are employed in DRDO, ISRO, Aeronautical manufacturing companies and their ancillaries, Airlines in Maintenance engineer roles, Indian Air Force, IT companies with Engineering vertical, R&D units as acedmics.