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Q.

Which of the following adds/add nitrogen to the soil?

I. Excretion of urea by animals
II. Burning of coal by man
III. Death of vegetarian

Select the correct answer using the codes given below.

[A] I only
[B] II and III only
[C] I and III only
[D] I, II and III
Answer & Explanation
Option: [C]

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