30 Topic-Wise Upsc Civil Services IAS Prelims Previous Year Solved Papers 1 & 2 (1995 - 2024) - General Studies & Aptitude (Csat) Pyqs Question Bank - 30 Topic-wise UPSC Civil Services IAS Prelims Previous Year Solved Papers 1 & 2 (1995 - 2024) 15th Edition | General Studies & Aptitude (CSAT) PYQs