Match the process involved in nitrogen or sulfur cycle in Group | with the corresponding microbe in Group II.
|
Group I |
Group II |
||
|
(P) |
Denitrification |
I) |
Azotobacter |
|
(Q) |
Nitrogen fixation by free-living microbe |
2) |
Beggiatoa |
|
(R) |
Oxidation of H2S to sulfur |
3) |
Pseudomonas |
|
(S) |
Nitrogen fixation by a symbiotic microbe |
4) |
Rhizobium |
1
P-2, Q-3, R-4, S-1
2
P-2, Q-1, R-3, S-4
3
P-3, Q-4, R-1, 8-2
4
P-3, Q-1, R-2, S-4