What is the meaning of the following traffic sign?

- Correct answer: You may pass the marked place from either its right or left.
- Pass the place that is marked with a signpost from its right.
- No right or left turn.
- It is prohibited to drive forward.
Why this is the answer
The correct answer in the official bank: You may pass the marked place from either its right or left.
A round blue sign gives an instruction, and the two white arrows pointing down to both sides show that the obstacle or traffic island may be passed on either side, as the driver chooses. It does not ban turning or driving ahead; prohibitions use red-bordered round signs. A similar sign with a single arrow requires passing on one side only.