Introduction:
UPSC (Union Public Service Commission) conducts the Civil Services Examination (CSE) every year to recruit candidates for various administrative positions in the Indian government. The Medical Science optional subject is one of the many subjects that candidates can choose to appear for in the UPSC CSE.

Websites for Previous Years Question Papers:
1. EduRev: EduRev is a popular online learning platform that provides a wide range of study materials, including previous years' question papers for various subjects, including Medical Science. It offers a comprehensive collection of question papers that can be accessed for free. You can visit the EduRev website and search for UPSC Medical Science previous years' question papers to find a plethora of resources.

Benefits of Using EduRev:
- Comprehensive Collection: EduRev provides a comprehensive collection of previous years' question papers for UPSC Medical Science optional subject.
- Free Access: You can access the question papers on EduRev for free, making it a cost-effective resource.
- User-Friendly Interface: EduRev has a user-friendly interface that allows easy navigation and search for question papers.
- Variety of Formats: The question papers on EduRev are available in various formats, such as PDF, making it convenient for candidates to download and study.

How to Use EduRev:
1. Visit the EduRev website.
2. Use the search bar to search for "UPSC Medical Science previous years question papers."
3. Explore the available question papers and select the ones you want to study.
4. Download the question papers in your preferred format, such as PDF.
5. Start solving the question papers to get familiar with the exam pattern and practice answering questions within the stipulated time.

Conclusion:
EduRev is a reliable and recommended platform to find previous years' question papers for the UPSC Medical Science optional subject. It offers a comprehensive collection of question papers that can be accessed for free. By practicing these question papers, candidates can enhance their preparation and increase their chances of performing well in the UPSC CSE examination.