Hello Civil Services Aspirant!

B.A Political Science honours will help you a lot if you're planning to prepare for UPSC. You can choose your main subject as Political Science in the exam. If you pursue your bachelors degree with Political Science honours, it will help a great deal as most of the concepts will be taught in the class and it will ease your preparation in future.

BA English is also not at all a waste. It will help you with your vocabulary which in turn help you to frame better answers.

But in my opinion, BA Political Science is a better option.

Good luck!