CBSE 12th

Dear Saurav,
There are many universities which provide B.Sc and BA in mathematics and physics.

No, you need to complete UG first.

Share your JEE Mains rank and the engineering stream you want to opt for better assistance.

Hello Jignesh,
It's nice to know your dream of clearing this entrance exam. Well it's actually very simple. Simply visit the webpage of COMEDK for downloading of detailed brochure. All required information is available there.
Best wishes

No, it's not possible. Diploma is a regular course so you can only do a course in distance mode along with Diploma.

After completing class 12th in commerce stream, you have plenty of options to choose. BBA and B.Com are the most common courses opted by the students. Besides BBA & B.Com, there are also other courses available which can lead you to a bright career.
1. Bachelor of Commerce (B.Com)
2. Bachelor of Management Studies (BMS)
3. Bachelor of Business Studies (BBS)
4. Bachelor of Business Management/Administration (BBM/A)

Starting early is a great advantage as you can build your general awareness and really excel in the GS paper and interview as you will tune yourself to analysis and awareness. Also, when the time comes, you will not waste it on finding out about the exam and losing your precious time.

Hello Abhinav,
It's good to know your dream. There are two ways of getting into merchant Navy. One as an officer and the other as sailor. Both are equally good. Since life involves some hardships, pay & allowances are extremely good. Many companies in this field have schools for training as sailor including shipping corporation of India . You will get required information from their webpage.

BA Mass Communication from top 10 institutes will help you to have a good placement. You may refer to following link for list of top Mass Communication colleges:
https://www.shiksha.com/mass-communication-media/ranking/top-mass-communication-colleges-in-india/99-2-0-0-0
https://www.shiksha.com/mass-communication-media/articles/top-10-mass-communication-colleges-in-india-blogId-13552

IIMC only offers Post-Graduation courses and other diploma courses. It doesn't Offer Graduation Courses.
There are various other Universities in Which you can take admission after 12th.