There are several sources available for staying updated with current affairs relevant to the Philosophy Optional for the UPSC exam. These sources provide valuable insights, analysis, and discussions on various philosophical topics and contemporary issues. Here are some recommended sources:

1. Newspapers:
- The Hindu: It is a widely respected newspaper known for its comprehensive coverage of national and international affairs. It regularly publishes articles related to philosophy, ethics, and current debates in philosophy.
- Indian Express: This newspaper also covers philosophical and ethical issues in its editorial and opinion sections. It provides a diverse range of perspectives on contemporary topics.

2. Magazines:
- Philosophy Now: This magazine covers a wide range of topics in philosophy, including current debates and discussions. It provides accessible articles that make complex philosophical concepts easily understandable.
- Economic and Political Weekly: While primarily focused on economics and politics, this magazine often features articles that delve into philosophical dimensions of current affairs.

3. Online platforms:
- Stanford Encyclopedia of Philosophy: It is a reliable online resource that offers in-depth and well-researched articles on various philosophical topics. The articles are regularly updated, making it a valuable source for understanding contemporary philosophical debates.
- Internet Encyclopedia of Philosophy: Similar to Stanford Encyclopedia, this platform provides detailed articles on a wide range of philosophical subjects, including topics relevant to current affairs.

4. Podcasts:
- Philosophy Bites: This podcast features interviews with prominent philosophers on a variety of topics, including current issues. It provides a concise and accessible way to engage with philosophical ideas in a conversational format.
- The Partially Examined Life: This podcast explores philosophical ideas through discussions and debates. It often covers contemporary philosophical issues and offers different perspectives on them.

5. Online Forums and Discussion Boards:
- Reddit: The philosophy subreddit offers a platform for discussions on various philosophical topics, including current events. It can be a valuable resource for gaining different perspectives and engaging in debates.

Remember, while these sources can provide valuable insights and information, it is important to critically analyze and evaluate the content to form your own opinions. Additionally, referring to the syllabus and previous year question papers will help you identify the areas of philosophy that are more likely to be asked in the exam.