Which one of the following statement is NOT correct regarding ozone?
Ozone is a gas that occurs both in the earth's upper atmosphere and at ground level
The source paper marks option (C) as the incorrect statement. However, it is a well-established scientific fact that ozone occurs both in the earth's upper atmosphere (stratosphere, forming the protective ozone layer) and at ground level (as a secondary pollutant in smog), so statement (C) is actually true. This creates a conflict with well-established science; the marked answer is transcribed faithfully, with this discrepancy flagged.
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