Need Free Test Series for UPSC Prelims

Hey fellow aspirants,

I’m looking for free test series for UPSC Prelims 2025. If anyone knows about good quality mock tests (full-length or sectional) that are available for free, please share the links or sources.

I’ve heard that some coaching institutes release free mock tests, and Telegram channels also provide PDFs, but it’s hard to find reliable ones. Any help would be appreciated!