What is "peripheral lighting" according to the traffic regulations?

1. AA lighting system of lamps with yellow light, arranged around the oversize load at a distance of 100 cm from each other or less.
2. BA lighting system that is not fixed to the vehicle, with a chain on which flags are mounted, spaced at least 50 cm from each other.
3. CGreen-coloured lamps installed on the sides of a long vehicle.
4. DA lighting system fixed to the sides of a long vehicle.

Pick an answer to test yourself