The correct option is (a) Blue .
Blue sign:
- Guide signs also utilize this color.
- These signs provide information on services like rest stops, hospitals, gas stations, and motels that are available near the road.
Mean of other signs color -
- Yellow: The color yellow denotes WARNING.
- Yellow traffic signs indicate a need to slow down, exercise caution, or issue a warning in general.
- It could have black text or symbols and be yellow or yellow-green in color. This sign alerts you to any risks that may be present on or near the roadway.
Orange -
- Anywhere there is construction, there are orange traffic signs.
- This hue is used to warn you of potential dangers that may be present due to maintenance and construction work.
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