2. Quora:
- Quora is a popular question-and-answer platform where you can find discussions on a wide range of topics, including UPSC exam preparation.
- Look for relevant topics or create a new question related to UPSC Medical Science Optional subject to initiate discussions.
- Many aspirants and experts actively participate in discussions on Quora.

3. Facebook Groups:
- There are several Facebook groups specifically created for UPSC preparation.
- Search for groups related to UPSC Medical Science Optional subject and join them to connect with other aspirants.
- These groups often share previous years' question papers and engage in discussions related to the subject.

4. Telegram Channels:
- Telegram is a popular messaging app that also hosts various channels related to UPSC exam preparation.
- Look for channels dedicated to UPSC Medical Science Optional subject, where you can find previous years' question papers and engage in discussions with fellow aspirants.

5. Online Study Forums:
- There are various online study forums like Study.com, Examrace, and Gradeup where you can find discussions on UPSC Medical Science Optional subject.
- Explore the relevant sections of these forums to connect with like-minded aspirants, share your insights, and discuss previous years' question papers.

Remember, while engaging in these platforms, it is important to maintain a respectful and constructive attitude. Additionally, always cross-verify the information and use these platforms as a supplement to your overall preparation strategy.