railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Biology Biological Classification
Identify the symbiotic nitrogen-fixing bacteria from the following and select the code for the correct answer from the codes given below.
(A) Azotobacter
(B) Azospirillum
(C) Rhizobium
1
Only (C) of the above
2
Only (B) and (C) of the above
3
Only (A) and (C) of the above
4
All of the above