The position lights are...

Why this is the correct answer

Position lights are active light devices (not reflectors) whose purpose is to show other road users where your vehicle is and how wide it is. Their colours follow a simple, universal logic you should memorise: - FRONT: White. This tells oncoming drivers a vehicle is facing them. - REAR: Red. This tells drivers behind that a vehicle is ahead of them, moving away. - SIDES: Yellow (amber). This helps other drivers see a vehicle from the side, for example during overtaking. Why is option B wrong? Because it says the front position lights can be "white or yellow". Under current regulations, front position lights on modern vehicles must be white only. Why is option A wrong? Because it says the side lights are red. Side position lights are yellow (amber), not red. (They may only be red if they are physically grouped into or incorporated within a rear light unit.) Important details: - Side position lights are mandatory only on vehicles longer than 6 metres (such as trucks, buses, or trailers). On shorter vehicles (like regular cars), they are optional. That is why the answer says "generally" yellow at the sides. - Do not confuse position lights with reflectors (cataphots). Reflectors are passive devices that bounce back light from other vehicles. Position lights are powered by the vehicle's own electrical system and must be switched on. - Position lights must always be on whenever you use dipped beams, main beams, or front fog lights. - They must also be on when your vehicle is stopped on the road or hard shoulder in poorly lit conditions between sunset and sunrise.