Which of the following is used to derive missing figures in a system of incomplete records?

A control account is used to derive missing figures in a system of incomplete records. Incomplete records refer to situations where a business does not maintain complete and accurate financial records, such as single entry bookkeeping systems. A control account summarizes the transactions of the business and provides a snapshot of the financial position of the business at any given time. It is used to derive missing figures by comparing the balances of the control account at different periods, making adjustments for transactions not included in the account, and calculating the missing figures based on the adjusted balances. The other options listed, such as bank account, profit and loss account, and bank statement, are financial tools used in accounting, but they are not specifically designed to derive missing figures in a system of incomplete records.