Tolerable limit of nitrogen oxides in air is __________ ppm. Options: A . &nbsp0.1 B . &nbsp1 C . &nbsp5 D . &nbsp25

Tolerable limit of nitrogen oxides in air is _________

Question

Tolerable limit of nitrogen oxides in air is __________ ppm.

Options:

A . 0.1

B . 1

C . 5

D . 25

Answer: Option C

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