Option 1: none -> Indicates zero people had any clue, fitting the negative contrast introduced by "but."
Option 2: some -> Would imply a few people did have a clue, contradicting the negative tone of the sentence.
Option 3: few -> Means a small number had a clue, but the sentence structure with "but" requires complete absence.
Option 4: everyone -> Would mean all people had a clue, which makes no logical sense with "but" in this context.
Hence, Option 1: none -> The conjunction "but" introduces a contrasting negative outcome, requiring a word that indicates complete absence of knowledge. "None of them" correctly conveys that not a single person knew the way to the station. -> correct