On a road, sign 405 is placed, and on this road a motorcycle overtakes a private vehicle:

1. AAccording to the sign, overtaking is entirely forbidden while driving.
2. BAccording to the sign, both of them are forbidden to be on this road.
3. CAccording to the sign, a private vehicle is forbidden to overtake a motorcycle.
4. DAccording to the sign, a motorcycle is forbidden to overtake a private vehicle.

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