Which of the following is not a Subsidiary Book in Accounting?

The "Ledger Book" is not a Subsidiary Book in Accounting. Subsidiary Books, also known as subsidiary ledgers, are used to record specific types of transactions in detail before they are summarized and posted to the general ledger. The purpose of subsidiary books is to facilitate the efficient recording and organization of various transactions before they are transferred to the primary or general ledger. The other options mentioned are all examples of Subsidiary Books: Sales Book: It is used to record all credit sales transactions. Purchase Book: It is used to record all credit purchase transactions. Cash Book: It is used to record cash and bank transactions. On the other hand, the "Ledger Book" is the primary or general ledger, which is used to record summarized transactions from subsidiary books. It contains individual accounts for assets, liabilities, equity, income, and expenses, and it shows the balances of these accounts after all transactions have been posted.