Hello there,
Hope you are doing well.
Even if you are a PCB student, you can take admission in BA (Hons.) Political Science Course in Delhi University provided you meet its cutoff eligibility criteria and once you get admission in your interested course you can choose Economics as your GE (General Elective).
There are a total of six semesters in your 3 year undergraduate course. In first four out of six semesters you have to choose one subject of your choice as GE. You can take Economics as your GE and if you continue to study the same GE in continuous four semesters you could become a holder of minor degree as well along with your major hons. degree and further you can even pursue your masters in that particular subject.
Hope this clears your doubt. All the best!
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