| Column I | Column II | ||
| A. | Thiobacillus | 1. | Nitrogen-fixation |
| B. | Nitrosomonas | 2. | Ammonification |
| C. | Azotobacter | 3. | Nitrification |
| D. | Pseudomonas | 4. | Denitrification |
A) A-4B-3C-1D-2
B) A-3B-4C-1D-2
C) A-4B-2C-1D-3
D) A-2B-1C-3D-4
Correct Answer: A
Solution :
| Column I | Column II |
| A. Thiobacillus B. Nitrosomonas C. Azotobacter D. Pseudomonas | 4. Denitrification 3. Nitrification 1. Nitrogen-fixation 2. Ammonification |
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