Dangerous gases are produced during bacterial decomposition of organics in wastewater. The main gases are-
a. Hydrogen Sulfide, Carbon Dioxide & Methane
b. Hydrogen Sulfide, Carbon Monoxide, & Methane
c. Natural gas, Methane, & Hydrogen Sulfide
d. Ammonia, Methane, & Hydrogen Sulfide
e. Carbon Dioxide, Methane, & Ammoniakm

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