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#upscprelimsmcq #UPSC2025 #UPSCPreparation #UPSCEnvironment #PrelimsPYQ #UPSCAnalysis #UPSCStrategy #UPSCValueAddition #CivilServicesExam #upsc2025prelims Download UPSC Prelims PYQ Environment 2014 pdf: https://drive.google.com/file/d/1-d9n... With reference to 'fly ash' produced by the power plants using coal as fuel, which of the following statements is/are correct? 1. Fly ash can be used in the production of bricks for building construction. 2. Fly ash can be used as a replacement for some of the Portland cement contents of concrete. 3. Fly ash is made up of silicon dioxide and calcium oxide only, and does not contain any toxic elements. Select the correct answer using the codes given below. a) 1 and 2 b) 2 only c) 1 and 3 d) 3 only Correct answer:a In this video, I analyze a Previous Year Question (PYQ) from the UPSC Prelims 2015 related to the Environment. I break down each option, explain the correct answer, and provide value-added insights for each option to deepen your understanding. Additionally, I highlight the next possible questions UPSC might ask, based on trends and patterns. This is part of a series designed to help you prepare effectively for UPSC Prelims 2025 by mastering PYQs and anticipating future questions. Stay tuned for more!