What do these signs indicate?

A)A speed limit of 40 kilometres per hour for vehicles that are going to turn right.
B)A speed limit of 40 kilometres per hour on a through road.
C)The speed limit on a stretch frequently used by children.Correct
The lower sign in the question prohibits travelling at a speed, in kilometres per hour, higher than that indicated on the sign. When placed on the same post as a hazard warning sign or on the same panel as it, it indicates that the prohibition ends when the indicated hazard ends — in this case, an area frequently used by children.