Which reaction takes place during denitrification?
a) CoH-206 + 6 O2 → 6CO2 + 6 H2O
b) NO2 + 0.5 02 → NO3-
C) NH4 + 1.5 02 → NO2 + H2O + 2 H
d) 5 CoH-208 + 24 NO3- →24 HCO3" + 6 CO2 + 18 H2O + 12 N2
