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UP POLICE SIUP POLICE SI Hard Mock Set 1Hard GK

UP POLICE SI Mock Test Set 1, Q29: Identify the correct answer for gas used in many electrical fire extinguishers.

A. Oxygen
B. Nitrogen dioxide
C. Carbon dioxide
D. Hydrogen
Correct Answer: C. Carbon dioxide
Explanation: CO2 does not support combustion. Category: UP POLICE SI. Set: 1.
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