Correct Option: B. To summarize and verify the total balances of related subsidiary accounts Detailed Explanation: Control accounts are a crucial component of financial accounting, particularly in the context of managing and summarizing financial data. The primary purpose of control accounts is to provide a summary of the total balances of related subsidiary accounts. Here’s a step-by-step breakdown of why option B is correct:

1. Definition of Control Accounts: Control accounts are general ledger accounts that summarize the total balances of a group of related subsidiary accounts. For example, in accounts receivable, the control account will show the total amount owed by all customers, while the subsidiary accounts will detail the amounts owed by each individual customer.
2. Purpose of Control Accounts:
3. Summarization: Control accounts condense information from multiple subsidiary accounts into a single line item in the general ledger. This makes it easier for accountants to see the overall financial position without getting bogged down in the details of every transaction.
4. Verification: By comparing the balance of the control account with the total of the subsidiary accounts, accountants can verify the accuracy of the records. If the two figures do not match, it indicates that there may be errors in the subsidiary accounts that need to be investigated.
5. Efficiency in Reporting: Control accounts enhance the efficiency of financial reporting. Instead of reviewing numerous individual transactions, accountants can quickly assess the overall financial situation through the control account.
6. Facilitating Internal Controls: Control accounts play a significant role in internal controls. They help in detecting discrepancies and ensuring that the accounting records are accurate and complete. This is particularly important in larger organizations where numerous transactions occur daily.

Why Other Options Are Incorrect:

• Option A: To provide detailed transaction records for every individual account This option is incorrect because control accounts do not provide detailed transaction records. Instead, they summarize the total balances of the subsidiary accounts. Detailed records are maintained in the subsidiary ledgers, not in the control accounts.
• Option C: To eliminate the need for double-entry bookkeeping This option is misleading. Control accounts do not eliminate the need for double-entry bookkeeping; rather, they operate within the double-entry system. Double-entry bookkeeping is a fundamental principle of accounting that ensures every transaction is recorded in at least two accounts, maintaining the accounting equation (Assets = Liabilities + Equity).
• Option D: To serve as a primary ledger for recording all financial transactions This option is incorrect because control accounts are not primary ledgers. They are summary accounts that reflect the totals of subsidiary ledgers. The primary ledger is the general ledger, which contains all accounts, including control accounts and subsidiary accounts.

Summary of Key Points:

• Control accounts summarize and verify the total balances of related subsidiary accounts.
• They enhance efficiency in financial reporting and facilitate internal controls.
• Control accounts do not provide detailed transaction records, nor do they eliminate the need for double-entry bookkeeping.
• They serve as a tool for ensuring the accuracy of financial records by allowing for easy comparison between summarized totals and detailed subsidiary accounts.

This understanding of control accounts is essential for effective financial management and accurate reporting in any organization.