A speed limit sign painted on a lane of the carriageway delimited by longitudinal broken lines applies...

A speed limit sign painted on a lane of the carriageway delimited by longitudinal broken lines applies...
A)To the entire carriageway, because the lines delimiting the lane are broken.
B)Only to the vehicles travelling in the lane in which the sign is located.Correct
The speed limit established by a horizontal sign applies until the next «end of prohibitions» sign, «end of speed limit» sign or another different maximum speed sign.
If the lanes are delimited, this limit applies only to the lane where it is painted. If they are not delimited, the limit will affect the whole carriageway.