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Gases commonly referred as green house gases are : 1. CH4 2. CO2 3. CFC 4. NH3 Which of the above is/are correct? (a) 1 and 4 (b) 2 and 3 (c) 1, 2 and 3 (d) All of these |
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Answer» (c) 1, 2 and 3 |
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