Which of the following is the function of nitrifying bacteria?
A
Oxidise $$NH_3$$ to $$NO^-_3$$
B
Oxidise $$NH_3$$ to $$NH^+_4$$
C
Convert $$NO^-_3$$ to $$NH_3$$
D
Convert $$NO^-_3$$ to $$N_2$$
Correct option is A. Oxidise $$NH_3$$ to $$NO^-_3$$
Nitrifying bacteria is an aerobic bacteria that use inorganic chemicals as an energy source. They are important in the nitrogen cycle as converters of soil ammonia to nitrates by the process of oxidation.
So the correct answer is 'oxidise NH$$_3$$ to NO$$_3$$-'.