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  1. Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent.

    2. A.
    84
    B.
    88
    C.
    80
    D.
    92

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    Answer : Option A

    Explanation :

    No answer description available for this question.

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