UPSC CSE Prelims
Question 36
Consider the following statements :
- Agricultural soils release nitrogen oxides into environment.
- Cattle release ammonia into environment.
- Poultry industry releases reactive nitrogen compounds into environment.
Which of the statements given above is/are correct?
View correct answer and explanation
Correct answer: D
Correct Option: D
Explanation:
Agricultural fertilisation and manure emit reactive nitrogen compounds. Soil microbes produce nitrogen oxides, livestock waste volatilises ammonia, and intensive poultry production releases ammonia and other nitrogen species.
Statement / Pair Analysis:
1 (Correct): Soil nitrification and denitrification emit nitric oxide and nitrous oxide.
2 (Correct): Cattle manure and urine release ammonia through nitrogen volatilisation.
3 (Correct): Poultry litter and waste emit ammonia and other reactive nitrogen compounds.
Option-wise Analysis:
A (Incorrect): It omits true item 2 (Cattle manure and urine release ammonia through nitrogen volatilisation).
B (Incorrect): It omits true item 1 (Soil nitrification and denitrification emit nitric oxide and nitrous oxide).
C (Incorrect): It omits true item 1 (Soil nitrification and denitrification emit nitric oxide and nitrous oxide); omits true item 3 (Poultry litter and waste emit ammonia and other reactive nitrogen compounds).
D (Correct): Includes all and only the true statements/pairs.