![The Pollution Standard Index (PSI) scale has span from](https://www.gkseries.com/blog/wp-content/uploads/2021/12/The-Pollution-Standard-Index-PSI-scale-has-span-from.png)
Q. The Pollution Standard Index (PSI) scale has span from
- 0-200
- 0-300
- 0-400
- 0-500
Answer: 0-500
Answer: 0-500
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