What is the meaning of the following traffic sign?

1. No left turn.
2. No U-turn to the left during night time only.
3. Correct answer: A "u" turn at the nearest left turn is forbidden.
4. No U-turn to the left and no left turn.

WhyThe crossed-out U-turn arrow prohibits a U-turn at the nearest left turn, day and night. It does not prohibit turning left.