WBCS.LIVE practice question

WHich of the following adds/add nitrogen to the soil? 1. Execretion of urea by animals 2. Burning of coal by man 3. Death of vegetation Select the correct answer using the codes given below.

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 1 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3

Correct answer and explanation

Correct answer: 1 and 3 only