which one Is better optional sociology or political science and international relations in UPSC having same interest in both which one is more scoring if we want to do graduation in any one of them
From the UPSC civil Services examination point of view i would suggest you to choose Sociology. It is because the syllabus generally doesn't change much and it is not that conceptual subject too. I am not saying that it is a cake walk but as compare to International Relations it can be easy.
You can consider Anthropology too. You can have a look at this subject if you have time.
All the best !!