The process of conversion of ` 2 NO_3 ^(- ) to 2 NO _ 3 ^(-) to 2 NO to N _ 2 O to N _ 2 ` is called ________ and is done by
A. Nitrification, Nitrosomonas
B. Denitrification, Pseudomonas
C. Nitrate assimilation, Rhizobium
D. Ammonification, Bacillus
