Introduction:
When preparing for UPSC Philosophy Optional, it is essential to have access to journals that focus on ethics. These journals provide valuable insights, research papers, and analysis related to the subject. Here are some reliable sources where you can find such journals:

EduRev:
EduRev is an excellent platform for UPSC aspirants, offering a wide range of study materials, including journals on ethics for the Philosophy Optional paper. You can find a vast collection of journals on EduRev, which are curated by experts and cover various aspects of ethical theories, moral philosophy, and applied ethics.

Key Journals:
- Journal of Ethics: This journal is dedicated to the exploration of ethical theory and practice. It covers a wide range of topics, including normative ethics, metaethics, moral psychology, and political philosophy.

- Ethics: Published by the University of Chicago Press, Ethics is one of the most prestigious journals in the field of philosophy. It features articles on ethical theory, applied ethics, and moral philosophy.

- Journal of Moral Philosophy: This journal focuses on contemporary work in moral philosophy and ethics. It covers a broad range of topics, including moral psychology, moral epistemology, and normative ethics.

- Journal of Applied Philosophy: If you are interested in the application of ethical theory to real-world issues, this journal is a valuable resource. It publishes articles on topics such as bioethics, environmental ethics, and business ethics.

- Ethical Theory and Moral Practice: This journal explores ethical theory and its practical implications. It covers topics like moral reasoning, moral education, and ethical decision-making.

Other Sources:
Apart from these key journals, you can also find relevant articles and research papers on ethics in reputable academic databases such as JSTOR, PhilPapers, and Google Scholar. These platforms provide access to a vast collection of scholarly publications in philosophy, including ethics.

Conclusion:
Access to journals focusing on ethics is crucial for UPSC Philosophy Optional preparation. Platforms like EduRev offer a wide range of journals on ethics, covering various aspects of the subject. Additionally, renowned journals such as Journal of Ethics, Ethics, Journal of Moral Philosophy, Journal of Applied Philosophy, and Ethical Theory and Moral Practice provide valuable insights and research papers. Alongside these journals, academic databases like JSTOR, PhilPapers, and Google Scholar are also reliable sources for finding relevant articles and research papers on ethics.