Which one of the following is not included in the National Air Quality Index?
[amp_mcq option1=”Sulphur” option2=”Nitrogen dioxide” option3=”Lead” option4=”Methane” correct=”option4″]
This question was previously asked in
UPSC CDS-2 – 2017
Which one of the following is not included in the National Air Quality Index?
[amp_mcq option1=”Sulphur” option2=”Nitrogen dioxide” option3=”Lead” option4=”Methane” correct=”option4″]