Incorrect!

You're driving at night on an unlit road. What should you do if you're following another vehicle?

Flash your headlights
Use dipped headlights
Correct answer
Switch off your headlights
Use full-beam headlights
You selected this answer

DVSA theory test explanation

If you follow another vehicle with your headlights on full beam, they could dazzle the driver. Leave a safe distance and make sure that the light from your dipped beam falls short of the vehicle in front.