BBA

IMS, Amity, and IILM are some of the institutes. However, I would suggest you do BBA first and then try in top-ranked colleges for MBA as many of them don't provide integrated courses or BBA. If you have the passion for something then nothing will be difficult for you.

Make sure you score high percentage in class 12th. After that, you can apply in many institutes like BVIMR, Amity, IP University, JIMS, and Jaipuria. There you will need to first clear written exam & then sit in GD or interview or both, as per their process.

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).

There are over 51 BBA colleges in Chennai. Please refer to the link provided below for a detailed list of these colleges. You should be able to navigate to the top colleges in this list using the filters on the web page.
Regards.
https://www.shiksha.com/bba/colleges/bba-colleges-tamil-nadu?uaf[]=location&ts=43430703&rf=filters&ct[]=64

Hi Shivam,
If you want to pursue BBA in event management, NAEMD is the best institute for it. You will have to appear for an entrance test designed to check the candidate's personality traits, academics, goals and self-awareness level. The test will be followed by an interview which will determine your final selection. For more information, you can visit this webpage and download the brochure:
https://www.shiksha.com/bba/course/bba-in-event-management-and-pr-national-academy-of-event-management-and-development-mumbai-goregaon-west-94042

Which course do you want to kno0w about?

Both are good in their own aspects, it's you who have to decide which one is better for you on a long run. Choose the one you are more interested in, don't listen to others. Google about both of them, their pros as well as cons and then make your decision.