About Direction of travel and overtaking bans: D-signs and F-signs: which statement is WRONG?

F3 specifically bans TRUCKS from overtaking motor vehicles, not cars or other drivers.
✓ Sign F1 bans everyone from overtaking: motor vehicles may not pass cyclists or moped riders either.
The duty is following ONE OF the directions shown on the sign — both displayed arrows are equally valid, there is no primary and fallback direction.
The duty is the direction shown on the sign — the arrow determines the direction, not the code itself; the same code D4 can point a different way with a different arrow.

Correct answer: Sign F1 bans everyone from overtaking: motor vehicles may not pass cyclists or moped riders either.

Explanation

F1 bans motor vehicles from overtaking EACH OTHER; mopeds are not motor vehicles, so passing a moped rider does not fall under it

F3 specifically bans TRUCKS from overtaking motor vehicles, not cars or other drivers
The duty is following ONE OF the directions shown on the sign — both displayed arrows are equally valid, there is no primary and fallback direction
The duty is the direction shown on the sign — the arrow determines the direction, not the code itself; the same code D4 can point a different way with a different arrow