What is the meaning of the following traffic sign?

- Correct answer: Turn leftt- turn before the sign.
- Entry to a one-way road.
- Drive left only. U-turn is prohibited.
- Turn left behind the sign.
Why this is the answer
The correct answer in the official bank: Turn leftt- turn before the sign.
A round blue sign is a mandatory sign, and you must obey it. The horizontal arrow points left and does not first go straight up before the turn. So you must turn left before the sign, not continue past it.