Option D is correct because the Ledger Folio (L.F.) column in the journal is specifically used to record the page number of the ledger book where the relevant account appears. This is clearly stated in the context: 'The column relating to Ledger Folio records the page number of the ledger book on which relevant account is appears.' This column is filled up at the time of posting entries to the ledger, not when the journal entry is originally made.