Dead remains of animals and plants are decomposed through microbial activity to produce ammonia. This event is known as :
Ammonification
Nitrification
Denitrification
Symbiotic nitrogen fixation
Find the mismatched pair among the following: i. Nitrification - Nitrosomonas ii. Ammonification - Nitrobacter iii. Denitrification - Azotobacter iv. Nitrogen Fixation - Nostoc