What is the meaning of the following traffic sign?

- Entry for bicycles only.
- Correct answer: No entry for bicycles.
- No entry for bicycles and motorcycles.
- No entry for four-wheeled motor vehicles.
Why this is the answer
The correct answer in the official bank: No entry for bicycles.
A white circle with a red border is a prohibition sign, and the symbol inside shows who the ban applies to. Here only a bicycle is shown, so bicycles may not enter, while motorcycles and other vehicles are not covered. A sign allowing bicycles only would be a blue circular mandatory sign, not a red-bordered one.