World Health Organization (WHO)

Consider the following statements:

  1. Recently, the World Health Organization (WHO) released new air quality guidelines - Global Air Quality Guidelines (AQGs).
  2. Redefining the threshold of safe air, this is the first revision after the last updation in 2010.
  3. The guidelines cover six pollutants - particulate matter 2.5 (PM2.5), PM 10, ozone (O3), nitrogen dioxide (NO2), sulfur dioxide (SO2) and carbon monoxide (CO).

Which of the above statement(s) is/are true?

A
1 and 2
B
2 and 3
C
1 and 3
D
All of the above
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