How can we rectify the errors which affect the trial balance?

By opening suspense account

The correct answer is option 1- By opening suspense account.

The errors which affect only one account can be rectified by giving an exaplanatory note in the account affected or by recording a journal entry with the help of the Suspense Account. Examples of such errors are error of casting; error of carrying forward; error of balancing; error of posting to correct account but with wrong amount; error of posting to the correct account but on the wrong side; posting to the wrong side with the wrong amount; omitting to show an account in the trial balance. Suspense account is an account in which the difference in the trial balance is put till such time that errors are located and rectified. It facilitates the preparation of financial statements even when the trial balance does not tally. When all the errors are located and rectified the suspense account stands disposed off.