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What makes police vehicles often recognizable?

  1. Green and yellow lights

  2. White and orange lights

  3. Red and blue lights

  4. Black and red lights

The correct answer is: Red and blue lights

Police vehicles are often recognizable due to the use of red and blue lights, which are commonly associated with law enforcement. Option A, green and yellow lights, are used for non-emergency vehicles such as construction or maintenance vehicles. Option B, white and orange lights, may be used for emergency or highway maintenance vehicles, but not specifically for police vehicles. Option D, black and red lights, are not commonly used for police vehicles and may indicate a different type of emergency vehicle.