MCQOPTIONS
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| 1. |
Which of the following adds/add nitrogen to the soil?1. Excretion of urea by animals2. Burning of coal by man3. Death of vegetationSelect the correct answer using the codes given below. |
| A. | 1 only |
| B. | 2 and 3 only |
| C. | 1 and 3 only |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |