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Which of the following sign is an example of the prohibition sign?

  • A.Risk of explosion
  • B.Risk of fire
  • C.No smoking
  • D.First aid point

Answer: C

'No smoking' is an example of a prohibition sign. It is a red circle with a slash through a cigarette, which forbids an action.

'Risk of explosion' and 'Risk of fire' are warning signs, drawn as yellow triangles, because they warn of a hazard and do not forbid anything. The 'first aid point' sign is an information (safe condition) sign, shown in green. So the third option is the answer.

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