You are driving along a cross street in Beuningen and approach a side street. Before the junction stands a blue rectangular sign with a white arrow pointing left (C4). What does this sign tell you?
The side street is a one-way road in which traffic drives to the left; you may only turn left into it.
The side street is closed to all traffic; the arrow points out the diversion to the left.
You must turn left here: the arrow is a command, like on the round blue signs.
Explanation
False — trap: C4 read as a mandatory sign. **C4 informs about the SIDE STREET: traffic there drives in the direction of the arrow** — you need not turn, but entering is only possible in that direction. Mandatory signs (D series) are round and blue. Book p.61-64 (H4).