Truth be told, there is no easy road when coming to UPSC. The selection proocess itself is so designed that the most smartest minds can get into the Administrative system.

UPSC is a 3 stage   selection process involving Prelims, Mains and Interview which tests your personality test. Prelims has 2 Papers namely General Studies and CSAT.

General Studies has Current Events, History of India and Indian National Movement, Indian and World Geography, Indian Polity and Governance, Economic and Social Development, Environmental Ecology, Biodiversity and Climate Change and General Science.

CSAT has Comprehension, Interpersonal skills including communication skills, Logical Reasoning and Analytical ability, Decision making and problem solving, General Mental Ability, Basic numeracy and Data Interpretation.

But to pick up one subject among these two, Political Science can help you score better because Candidates who chose subjects like Sociology, Geography, Public Administration and Political Sciences scored better than the Candidates who selected other Subjects. No matter whichever subject you choose, you will need atleast to start preparing ahead of 1- 2 years. If you are preparing at home, you need to keep yourself away from distractions and focus on the goal ahead. Gather as much as information as you can on each topic and keep yourself updated. Practise mock test papers.