# Leghemoglobin is used to protect the nitrogenase in the Rhizobium from inactivation by

$( A ) CO \\ ( B ) none \\ ( C ) O2 \\ ( D ) N2$

Ans: ( C ) O2
Nitrogenase is highly sensitive to oxygen. It needs anaerobic condition to maintain this conditon, leg haemoglobin acts as an oxygen scavengers.