Mumbai

Please refer to the link to know about the details: https://www.shiksha.com/humanities-social-sciences/colleges/international-relations-colleges-india and https://www.shiksha.com/humanities-social-sciences/political-science/colleges/international-relations-colleges-mumbai-all.

You need a rank under 500 to get admission in any of the top 2 colleges.

Hi, Yes he can.
Minimum Eligibility to Apply
12th: 55%
Additional Details: Physical Education, Fine Arts, Performing Arts, Vocational, Non Written subjects will not be considered while calculating the aggregate.
https://www.shiksha.com/bba/course/bachelor-of-business-administration-amity-university-Mumbai-panel-231224.

Hi Tejas!
St Xavier's Institute of Communications is the best college in Mumbai and is one of the top colleges for Mass Communication courses in India. But since you have budget constraints, I would suggest you to go for University of Mumbai. The quality of studies is great and is budget friendly as well.

Hi Komal!
These are the best colleges in Mumbai for Interior design:
JJ School Of Arts
Pearl academy
International Institute of Fashion Design
JD Institute of Fashion Technology
Amity University.

There are many places where you can do your internship from. There are many government hospitals like AIIMS, Mumbai and institutes like AIIPMR which offer internships to students, However, you may have to appear for an entrance exam to qualify for the internship.

But as per your marks, you should have a good score for the placement package that you will be expecting. There are also good colleges in Mumbai as well but as per ROI which will have higher fee structures as well.
For Pune, below is the link provided for the reference:
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-Pune/2-2-0-174-0