Option A is correct because the passbook is a copy of the customer's account as maintained in the bank's ledger. This is directly stated in the fill-in-the-blank: 'Passbook is a copy of……as it appears in the ledger of the bank.' Additionally, the text clarifies that 'A bank statement or a bank passbook is a copy of a bank account as shown by the bank records.' The other options are incorrect because the passbook is not a copy of the cash book columns or merely a list of receipts and payments.