Match LIST-I with LIST-II
| LIST-I | LIST-II |
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| A. | Biological nitrogen fixation | I. | Nitrobacter |
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| B. | Conversion of ammonia to nitrite | II. | Paracoccus |
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| C. | Conversion of nitrite to nitrate | III. | Rhizobium |
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| D. | Denitrification | IV. | Nitrosomonas |
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Choose the correct answer from the options given below: