Where the following traffic sign is placed:

- All vehicles are permitted to park and wait for passengers.
- It is permitted to load a maximum of six passengers in each cab.
- It is forbidden to unload passengers within the boundaries of this sign.
- Correct answer: All vehicles are permitted to stop for the purpose of passenger unloading.
Why this is the answer
The correct answer in the official bank: All vehicles are permitted to stop for the purpose of passenger unloading.
According to the sign, any vehicle may stop to unload passengers, and only for that purpose. So it does not permit parking or waiting for passengers. The red prohibition symbol does not forbid unloading passengers.