The correct answer to the question “Which of the following is not an Oracle-supported trigger” is an option (b). DURING. All the other is supported by Oracle except During trigger, as it is not possible in any database. Wish to become an Oracle DBA? Enroll in the Intellipaat Oracle DBA training course, which offers you good industry-aligned training and projects for enhancing your practical skills. If you are just starting out, then I would suggest you check out the Oracle DBA video.