Colleges in Mumbai

Check with the possibility at the official portal.

Use this link:
https://www.shiksha.com/college-predictor

Use this link:
https://www.shiksha.com/college-predictor

Use this link:
https://www.shiksha.com/college-predictor

You must clear JEE Advanced as admission to the B.Tech, B.Sc. and the B.Tech + M.Tech. dual degree courses will be done on the basis of score obtained in the JEE Main and JEE Advanced.

CET is a mandate now for admission in every law college.

Nlsiu does provide international law. but as you have completed 12th you have to first pursue llb where the subject will be introduced to you then you can do llm in it. Criminal law is a different branch but there are some conventions that deal with non-conventional crimes that may happen at int. level. but still, domestic law can only give relief in the true sense. you will get clear picture of this once you complete your llb.

Advertising and Public Relation:
These two fields are different as it comes under Mass Communication and Journalism field. You can choose a specialization course in Advertising and a specialization course in Public Relations.
Check this: https://www.nimcj.org/advertising.html
https://www.nimcj.org/public-relations.html

For what thing are you particularly asking?