According to air pollution data released by United States Air Quality Index 2020, which city topped in world's most polluted cities?

1. 

According to air pollution data released by United States Air Quality Index 2020, which city topped in world's most polluted cities?
[A]. Faisalabad
[B]. Delhi
[C]. Lahore
[D]. Karachi

Answer: Option C

Explanation:

Lahore ranks the most polluted city in the world, according to air pollution data released by the US Air Quality Index. It's reported a particulate matter (PM) rating of 423.

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