Errors in a ledger can be corrected through the journal proper. The journal proper is a book of original entry where transactions that cannot be recorded in any other special journal are entered. It is used for recording infrequent transactions such as correcting errors in the ledger accounts.
When an error is detected in a ledger account, it must be corrected to ensure that the financial statements are accurate. The correction can be made by preparing a journal entry that reverses the original error and records the correct transaction. This journal entry is then posted to the appropriate ledger accounts to correct the errors.
Therefore, the correct answer to the question is the journal proper, as it is the only option that provides a platform for making journal entries to correct errors in the ledger accounts. The sales day book, purchases day book, and control account are all specialized journals that are used for recording specific transactions and cannot be used to correct errors in the ledger accounts.