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Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).

/ CHEMICAL ENGINEERING, Environmental Engineering / By
Question: Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).
[A].

highly

[B].

moderately

[C].

extremely

[D].

very extremely

Answer: Option B

Explanation:

No answer description available for this question.