The rear fog light must be used in case of...
A)Driving at night on an unpaved road.
B)Driving at dusk on a road without a shoulder.
C)Thick fog.Correct
# Rear Fog Light
The rear fog light is used exclusively when there is **thick fog** that significantly reduces visibility. This high-intensity red light allows other drivers to see your vehicle from behind in low visibility conditions. It must not be used in other situations such as driving at night or on unpaved roads, as it unnecessarily dazzles other road users.