It is allowed to make a U-turn:

1. Only when there is an unbroken white line.
2. Correct answer: From every lane, unless it is prohibited by a specific road sign.
3. Only in an intersection with traffic lights, where a left turn is permitted.
4. Only in an intersection without traffic lights where a left turn is permitted.

WhyA U-turn is allowed from any lane, unless a sign prohibits it and as long as you disturb no one. No special intersection or traffic light is needed. Crossing a solid white line is never allowed, so the first option is wrong.