You can pick the subject of your interest (Medical Sciences or any other that you prefer) for UPSC. Get familiar with the Prelims syllabus and start by going through basic books and previous papers to get an idea about the exam. Current affairs preparation can be done by reading newspapers on a regular basis.

Understanding UPSC Examination
The UPSC (Union Public Service Commission) examination is one of the most prestigious and competitive exams in India. It requires a well-structured preparation strategy.
1. Know the Exam Pattern
- Preliminary Exam: Objective type questions.
- Mains Exam: Descriptive type questions across various subjects.
- Interview: Personality test to assess your suitability for a career in public services.
2. Create a Study Plan
- Daily Schedule: Allocate specific hours daily for UPSC preparation alongside your BDS studies.
- Weekly Goals: Set achievable targets to cover subjects systematically.
- Revision Time: Include regular revision sessions to reinforce learning.
3. Syllabus Familiarization
- General Studies: Cover subjects like history, geography, polity, economy, environment, and current affairs.
- Optional Subject: Choose a subject that aligns with your interest and background (consider your BDS knowledge).
4. Resource Selection
- NCERT Books: Start with basic NCERT textbooks for clarity on concepts.
- Standard Reference Books: Refer to recommended books for deeper understanding.
- Current Affairs: Follow newspapers and magazines to stay updated.
5. Practice and Mock Tests
- Previous Year Papers: Solve past question papers to understand the exam format.
- Mock Tests: Regularly attempt mock tests to improve speed and accuracy.
6. Stay Healthy and Motivated
- Physical and Mental Health: Maintain a balanced diet, exercise, and ensure adequate rest.
- Motivation: Stay inspired by connecting with like-minded peers and mentors.
Start your preparation with commitment and a clear focus to succeed in the UPSC examination. Good luck!