Correct Option: B. To ensure that the total of individual accounts matches the general ledger Detailed Explanation: Control accounts are a crucial component of a self-balancing ledger system, primarily used to summarize the balances of individual accounts. Here’s a step-by-step breakdown of why option B is the correct answer:

1. Definition of Control Accounts: Control accounts are summary accounts in the general ledger that aggregate the balances of a group of related accounts. For example, a sales ledger control account summarizes all the individual customer accounts, while a purchases ledger control account summarizes all supplier accounts.
2. Purpose of Control Accounts: The primary purpose of control accounts is to ensure that the total of individual accounts matches the general ledger. This means that the total amount owed by customers (from individual customer accounts) should equal the balance in the sales ledger control account. This matching process helps in maintaining accuracy and integrity in financial reporting.
3. Self-Balancing Ledger System: In a self-balancing ledger system, each subsidiary ledger (like accounts receivable or accounts payable) has a corresponding control account in the general ledger. This system allows for easier tracking of discrepancies and errors. If the total of the individual accounts does not match the control account, it indicates that there may be an error that needs to be investigated.
4. Error Detection: By comparing the total of individual accounts to the control account, businesses can quickly identify discrepancies. This is essential for maintaining accurate financial records and ensuring that the financial statements reflect the true financial position of the business.
5. Efficiency in Reporting: Control accounts simplify the reporting process. Instead of having to report every single transaction from individual accounts, businesses can report the summarized totals from control accounts, making financial statements clearer and more concise.

Why Other Options Are Incorrect:

• Option A: To provide a detailed record of individual transactions This option is incorrect because control accounts do not provide detailed records of individual transactions. Instead, they summarize the totals of those transactions. Detailed records are maintained in the subsidiary ledgers, not in the control accounts.
• Option C: To simplify the process of journal entries While control accounts can help streamline the overall accounting process, their primary purpose is not to simplify journal entries. Journal entries are made in the subsidiary ledgers and then summarized in the control accounts. The simplification of journal entries is a secondary benefit, not the main purpose.
• Option D: To eliminate the need for a trial balance This option is incorrect because control accounts do not eliminate the need for a trial balance. A trial balance is still necessary to ensure that the total debits equal total credits in the general ledger. Control accounts help in verifying the accuracy of the subsidiary ledgers but do not replace the need for a trial balance.

Summary for Revision:

• Control accounts summarize the balances of individual accounts in the general ledger.
• Their primary purpose is to ensure that the total of individual accounts matches the general ledger.
• They help in error detection and maintaining accurate financial records.
• Control accounts do not provide detailed transaction records, simplify journal entries, or eliminate the need for a trial balance.