A city records an Air Quality Index (AQI) of 450 (Severe category). Under the Graded Response Action Plan (GRAP), which of the following measures is mandated specifically in this category?
- A Ban on construction activities
- B Odd-even vehicle rationing scheme ✓
- C Ban on entry of trucks into the city
- D Ban on use of diesel generators
Correct answer: B. Odd-even vehicle rationing scheme
Explanation
Under GRAP, when AQI enters the Severe category (401 to 500), measures include implementing the odd-even vehicle rationing scheme, banning diesel generators, and stopping construction. However, the odd-even scheme is a specific high-profile measure mandated in the Severe category. Ban on trucks and construction are typically initiated in the Poor to Very Poor categories. The odd-even scheme is the most specific answer for the Severe category.
Reference: Park's Textbook of Preventive and Social Medicine, 26th ed.
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