Business Management Studies

First of all, you have to appear for CAT examination and score good percentile in that and then perform well in GD-PI.

Hello,
Intergrated course can work wonders for you if you do it from a reputed institute. It's okay if you didn't study accountancy in high school because even science students go for BBA/MBA. This particular course unlike B.Com (Hons) is more business oriented. Basics of accountancy will be there initially for eg. important terms and it's use.

Yes, you can apply for only CDS exam for IMA and Officer Training. You cannot apply for Indian Naval Academy (it needs a degree in engineering or B.Sc with physics and maths) and Air Force (it needs a degree from a recognised university (with physics and maths at +2 Level or B.E/B.Tech).

If you are doing MBA from average college go for marketing specialisation. The opportunities are very vast after the completion of MBA Marketing.

Well, when it comes to DSM, it has got a brand name big enough that a recruiter pays an eye to your profile. Secondly, the location is a major advantage. Located in Delhi, you have many startups based out of NCR visiting the campus. You have the flexibility to go for an off-campus as well.
The campus is very dynamic and you have various events /conclave/seminar happening all throughout the year. The infrastructure is again very new. And you have an excellent team of faculty members to guide you.