Consider the following statements regarding the Air pollution tolerance index (APTI):
1. Air pollution tolerance index (APTI) and anticipated performance index (API) are used to assess the tolerance capacity of tree and crop species against air pollution.
2. Trees having a lower tolerance index rate can be used as a source to control air pollution.
3. The level of the only ascorbic acid content of different plants determines their tolerance against the adverse effect of oxidizing pollutants.
Which of the above statements is/are incorrect?
1
1 only
2
3 only
3
1 and 2 only
4
2 and 3 only