Refer to the given nitrogen cycle occurring in nature.

Identify processes I-IV and select the correct statement regarding them.

Options

A. Process II represents the conversion of ammonia into nitrates and is accomplished in two steps.
B. In process IV, plants absorb inorganic nitrogen compounds from the soil and convert them into organic compounds.
C. Process I represents the conversion of nitrates to free molecular nitrogen.
D. Process lll represents nitrogen fixation by Nitrosomonas.

Answer

B

Explanation

In the given figure of nitrogen cycle, processes I, II, Ill and IV represent nitrification, denitrification, nitrogen fixation and assimilation respectively.