Consider the following statements:
1. PM2.5 refers to particles with a diameter of less than 2.5 micrometres.
2. PM 2.5 remains suspended in the atmosphere for a shorter period of time.
3. PM 2.5 are not produced naturally.
4. Long-term exposure to PM 2.5 pollutants may increase the prevalence of anaemia among women of reproductive age.
Which of the statements given above are correct?1
1 and 2 only
2
2, 3, and 4 only
3
1 and 4 only
4
2 and 4 only