UPSC Prelims Medieval History – 2023
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UPSC Prelims Medieval History – 2023

June 25, 2024
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1) Consider the following: 1. Aerosols 2. Foam agents 3. Fire retardants 4. Lubricants In the making of how many of the above are hydrofluorocarbons used? (a) Only one (b) Only two (c) Only three (d) All four Correct Answer: (c) Only three 2) ‘Wolbachia method’ is sometimes talked about

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