B.A

Hey Shifa,
To know the fee structure of Rizvi College of Arts, Science and Commerce for BA, have a look at this page:
https://www.shiksha.com/college/rizvi-college-of-arts-science-and-commerce-bandra-west-mumbai-25511/courses/ba-bc

Here, you get complete information about eligibility and admission process for BA honors political science.
https://www.shiksha.com/humanities-social-sciences/course/b-a-english-political-science-history-christ-university-hour-road-Bangalore-277235

Kindly visit this link:
https://www.shiksha.com/b-a-bachelor-of-arts-chp

Fees of BA political science in Amity University for 3 years is INR 2.49 lakhs.

Kindly visit this link:
https://www.shiksha.com/humanities-social-sciences/colleges/international-relations-colleges-india

Yes, maths is one of the eligibility criteria for BA in economics in colleges under Delhi University.

The general criteria for best 4 calculation is that you must add one language and 3 academic subjects from list A. So, if in place of maths, you wish to add any subject like physical education or music then there would be a deduction of 2.5% from your total percentage after calculating the best fours. And yes, you might get admission in English honors in colleges like Bharti College and others affiliated with DU and might even get in Sri Guru Nanak Dev Khalsa if you wait for the 5th or 6th cut-off.

The registrations were out for all the courses of BA (Hons) in economics (Delhi University) on May 30, 2019. However, now they are closed.

Political Science is one of the top ten courses in Delhi University and however, your percentage will have a deduction of 5% as you are choosing to change your stream, which would make it dramatically low. Still, if you belong to SC / ST or some other category and choose to wait until the 8th or 9th round of the cutoff, you may get lucky and get the admission.