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UP POLICE SIUP POLICE SI Hard Mock Set 2Hard GK

UP POLICE SI Mock Test Set 2, Q29: Identify the correct answer for gas used in many electrical fire extinguishers.

A. Hydrogen
B. Oxygen
C. Nitrogen dioxide
D. Carbon dioxide
Correct Answer: D. Carbon dioxide
Explanation: CO2 does not support combustion. Category: UP POLICE SI. Set: 2.
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