What are the colors of slow-moving signs that are displayed on the rear of farm machinery on the road?

• Orange and red
  Explanation:

  "

  Farm machinery on the road must display an orange and red slow-moving sign on the rear of the vehicle. The sign warns other drivers that they are travelling at 40 km/h or less.

  "
• Blue and black
• Red, yellow, and green
• Red and green