माटोमा रहेको नाइट्रेटलाई वायुमण्डलीय नाइट्रोजनमा विच्छेदन गर्ने प्रक्रियालाई ........ भनिन्छ ।

Option D

Denitrification is a microbially facilitated process where nitrate is reduced and ultimately produces molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products. ... Denitrifying microbes require a very low oxygen concentration of less than 10%, as well as organic C for energy.