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      Question

      Which city was declared the world’s most polluted city

      with PM2.5 levels reaching 266 micrograms per cubic metre?
      A New Delhi Correct Answer Incorrect Answer
      B Lahore Correct Answer Incorrect Answer
      C Beijing Correct Answer Incorrect Answer
      D Hanoi Correct Answer Incorrect Answer
      E Dhaka Correct Answer Incorrect Answer

      Solution

      Hanoi topped the pollution list due to severe smog caused by traffic, industrial activities, and trash burning.

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