Atmospheric Nitrogen Can Be Fixed by Nitrogen-Fixing Bacteria

Multiple Choice

Atmospheric nitrogen can be fixed by nitrogen-fixing bacteria.Arrange the following forms of nitrogen from the atmospheric N stage to the final form that enters the roots.
1) Ammonia
2) Nitrogen gas
3) Ammonium ion
4) Nitrite
5) Nitrate

A) 1,2,3,4,5
B) 2,1,3,5,4
C) 2,1,5,4,3
D) 2,1,3,4,5