India

Dear friend, you can join Sri Ram College Of Commerce, Delhi which is a top college with good quality of education in India. International students are also enrolled there. It has good placements with super pay packages.

List of Agriculture colleges in Rajasthan :
Agriculture University, Jodhpur
College of Diary and Food Science Technology, Udaipur, Rajasthan
College of Agriculture, Bikaner, Rajasthan

Goa Institute of Management is better.

It is advised that you complete your class 12th first and then think of joining a film institute. No institute takes intake before class 12th.

Yes, you can very well go for BA after science in 12th. Check the below link for colleges offering BBA-
https://www.shiksha.com/bba/colleges/bba-colleges-delhi-ncr

Manipal is one of the known institutes you can look for. You can compare the colleges on below link based on rank/placement/fees.
https://www.shiksha.com/science/colleges/biotechnology-colleges-karnataka

There are no as such good institutes in both the states. Kindly refer to the link below:
https://www.shiksha.com/mass-communication-media/articles/top-5-colleges-offering-pr-courses-in-india-blogId-11019

The best option is to go for a Masters programme in event management and then join an event management company, as that will you an edge over others. The best event management colleges are listed below:
1. National Academy of Event Management and Development (NAEMD)
2. Indian Institute of Learning and Advanced Development
3. EMDI Institute of Media & Communication
4. National Institute of Event Management (NIEM)