Correct Answers: A and C
This is mentioned in the AWS Documentation.
Amazon RDS groups these events into categories that you can subscribe to get notified when an event in that category occurs. You can subscribe to an event category for a DB instance, DB cluster, DB snapshot, DB cluster snapshot, DB security group, or DB parameter group. For example, if you subscribe to the Backup category for a given DB instance, you will be notified whenever a backup-related event affects the DB instance. If you subscribe to a Configuration Change category for a DB security group, you will be notified when the DB security group is changed. You will also receive a notification when an event notification subscription changes.
Option B is incorrect because SQS is used as the messaging service. You need to use SNS topics for notifications.
Option D is incorrect because you need to subscribe to AWS RDS events.
For more information on database events, please refer to the below URL-
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_Events.html