If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains________?

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Academy of PakistanTest & Learning

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435Civil EngineeringMedium

AOxygen

BCarbon dioxide

CHydrogen sulphide

DMethane

Correct answer

B. Carbon dioxide

Explanation

The correct answer is Carbon dioxide.

If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains________? - Answer and Explanation | Academy of Pakistan