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UP POLICE SIUP POLICE SI Hard Mock Set 3Hard GK

UP POLICE SI Mock Test Set 3, Q29: Identify the correct answer for gas used in many electrical fire extinguishers.

A. Carbon dioxide
B. Hydrogen
C. Oxygen
D. Nitrogen dioxide
Correct Answer: A. Carbon dioxide
Explanation: CO2 does not support combustion. Category: UP POLICE SI. Set: 3.
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