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The National Air Quality Index (NAQI) in India uses ________ color codes to represent air quality levels.

  1. 5
  2. 6
  3. 7
  4. 8

Answer: 6

NAQI has six categories: Good (Green), Satisfactory (Light Green), Moderately Polluted (Yellow), Poor (Orange), Very Poor (Red), Severe (Maroon). Helps public understand pollution levels. [[CPCB Guidelines]]

Topic Environmental Science - Air Quality
Exam Relevance UPSC Prelims, SSC CGL, Railway NTPC

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