Which two distinct microbial processes are re | vedclass

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(D) The correct answer is $(D)$.Denitrification is a biological process in which nitrates $(NO_3^-)$ in the soil are reduced to molecular nitrogen $(N

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Anaerobic ammonium oxidation and denitrification

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(D) The correct answer is $(D)$.Denitrification is a biological process in which nitrates $(NO_3^-)$ in the soil are reduced to molecular nitrogen $(N_2)$ gas,which is then released into the atmosphere. This process is carried out by denitrifying bacteria such as $Pseudomonas$ $denitrificans$ and $Thiobacillus$ $denitrificans$.Anaerobic ammonium oxidation (often referred to as $ANAMMOX$) is another microbial process where ammonium $(NH_4^+)$ is oxidized to dinitrogen gas $(N_2)$ under anaerobic conditions,contributing to the nitrogen cycle by returning $N_2$ to the atmosphere.

Column $- I$	Column $- II$
$(a)$ Nitrococcus	$(i)$ Denitrification
$(b)$ Rhizobium	$(ii)$ Conversion of ammonia to nitrite
$(c)$ Thiobacillus	$(iii)$ Conversion of nitrite to nitrate
$(d)$ Nitrobacter	$(iv)$ Conversion of atmospheric nitrogen to ammonia

Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas $(N_2)$ to the atmosphere?

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