Business Management Studies

You have to complete your graduation in any stream with minimum 50% in that which is the criteria for most of the MBA colleges. Make sure you are doing your MBA from top most colleges for better future.

Yes, the first year for all specialisation is same in MBA. If there is trimester pattern then 1st 2 trimesters are same and from 3rd trimester you have the specialisation subjects.

CAT is the only exam that gives you admission in Iims Prepare hard for it and make sure your curriculum Percentages should be good and if you have job experience then its a plus side for Iims and side by side prepare for GD/PI.

Hello There!
You need to visit in Production company with your details and job position you're looking for their are few set director are Omung Kumar, Sabu cyril, Muthuiraj, etc. Mail them your details and your aspirant work.
Regards

This is the link for shiksha providing the same details.
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-mat/2-2-0-0-306

Your brother can opt for Improvement in the subjects he recieved less marks. For that refer to the CBSE Website at https://www.cbse.nic.in
Also refer to https://www.toppr.com/bytes/cbse-improvement-examination/for more information. Other choices your brother has are that he can pursue a UG course at local college and prepare for a UPSC Exam simultaneously.

TIME provides a fairly long duration courses. It also provides short duration courses of a few months. But more than duration of the course, the quality of coaching is very important. I was earlier with TIME for more than 9 years. It was a really good institute then However, I no longer work with TIME. I have left TIME, with two other brilliant faculty members Duney and Pravin. We together have started an Institute called SPARK EDUCATION SERVICES, and for CAT 2017 we have got many students who have scored above 98.5 percentile.

Pretty High. You may get admission in your selectes course easily. Last time spot counselling was conducted to fill vacant seats in multiple Business programmes.

First of all, I recommend you to try to prefer CSE over IT. If you don't like maths, have some creativity ( Good for Web Development ), don't like to read and write a lot, love technologies and most important - want to pursue careen in private sector (government jobs are very rare), then welcome. Here you will get advantage of MBA too.
Good luck.