Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct for this process of nitrogen fixation ?
A. Nodules act as sites for nitrogen fixation
B. The enzyme nitrogenase catalyses the conversion of atmospheric `N_(2)` to `NH_(3)`
C. Nitrogen is insensitive to oxygen
D. Leghaemoglobin scavenges oxygen and is pinkish in colour
