dB is a standard abbreviation used the quantitative expression of
A
The density of bacteria in a medium
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B
A particular pollutant
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C
The diminant Bacillus in a culture
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D
A certain pesticide
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Solution
The correct option is B A particular pollutant dB (decibel) is a standard abbreviation used for the quantitive expression of noise. Noise pollution is a physical form of pollution that affects the receiver directly.