Yes, the previous years' question papers for UPSC Medical Science Optional subject are available in PDF format. These question papers can be accessed and downloaded from various sources, including the official website of the Union Public Service Commission (UPSC) and other educational platforms such as EduRev.

Here is a detailed explanation of how to access and download these question papers in PDF format:

1. Official UPSC Website:
- Visit the official website of UPSC (www.upsc.gov.in).
- Navigate to the "Examination" section or search for the "Previous Question Papers" link.
- Look for the question papers specifically for the Medical Science Optional subject.
- Click on the desired year's question paper to open it in a new tab.
- On the new page, you will find the question paper in PDF format.
- Right-click on the PDF and select the "Save As" option to download it to your device.

2. EduRev:
- Visit the EduRev website (www.edurev.in).
- Use the search bar to find the UPSC Medical Science Optional question papers.
- Click on the relevant search result to access the question papers.
- On the question papers page, you will find a list of years or categories.
- Select the desired year or category to view the available question papers.
- Click on the PDF icon or the download link to download the question paper in PDF format.

Please note that while accessing these question papers, it is important to ensure that you are using reliable and trustworthy sources. The official UPSC website and reputed educational platforms like EduRev are recommended sources for accessing previous years' question papers.

Using these question papers in your preparation can be highly beneficial as they provide a clear understanding of the exam pattern, types of questions asked, and the level of difficulty. It is advisable to solve these question papers within the specified time limit to practice time management and improve your overall performance in the UPSC Medical Science Optional subject.