Which of the following errors will cause the trial balance to be out of order?

Question

Accepted Answer

The correct option is 4:
The central purpose of preparing a Trial Balance is to test the arithmetic accuracy of the ledger by verifying that the total of all Debit balances equals the total of all Credit balances. The errors that prevent the Trial Balance from agreeing are typically *one-sided errors*, meaning they affect only one account or one side of an account, thereby disturbing the fundamental equality of the double-entry system. Option 4 is correct because all three options—(1) wrong posting of a book total to the wrong side/account, (2) overcasting the total of a ledger account, and (3) undercasting the total of a subsidiary book—are classic examples of one-sided errors. Since each one disrupts the balance between the total debits and total credits, they all individually and collectively cause the Trial Balance to be out of order.

The incorrect option is 1:
This error states that the total of the Sales Return Book (which should be debited to the Sales Return Account) was incorrectly posted to the *credit* side of the Purchase Returns Account. This complex error is definitely one that will throw the Trial Balance out of agreement. The Debit side of the Trial Balance is missing the correct debit (Rs. 550), and the Credit side is incorrectly receiving a credit entry that does not belong there, thus causing a total difference of Rs. 1,100 (550 missing debit + 550 incorrect credit) between the two columns. However, this option is incorrect as the single best answer because it ignores the fact that options 2 and 3 are also valid causes of a disagreed Trial Balance.

The incorrect option is 2:
This option describes an error where the credit side of Santosh's Personal Account was overstated, or *overcast*, by Rs. 100. This is a clear one-sided error because only the total of Santosh's Account in the ledger has been incorrectly calculated. When the final balance of Santosh's Account is transferred to the Trial Balance, the Credit column total will be overstated by Rs. 100, while the Debit column total will be correct. Consequently, the two sides of the Trial Balance will not agree. As with the other errors, while this action definitely causes the Trial Balance to be out of order, it cannot be selected as the only correct answer when a complete option that includes all valid errors is provided.

The incorrect option is 3:
A casting error in a subsidiary book, such as the Sales Book being *undercost* by Rs. 50, is a common error that directly impacts the Sales Account total in the ledger. The total of the Sales Book is periodically credited to the Sales Account. By understating this total, the Credit side of the Sales Account is under-credited by Rs. 50. Since the Sales Account is a Credit balance, this undercasting leads to the Credit column of the Trial Balance being understated by Rs. 50, without a corresponding error on the Debit side. Although this error causes the Trial Balance to disagree, selecting it alone would be incomplete, as the error described in Option 1 and 2 also cause a disagreement.