**To describe the available option groups** The following ``describe-option-groups`` example lists the options groups for an Oracle Database 19c instance. :: aws rds describe-option-groups \ --engine-name oracle-ee \ --major-engine-version 19 Output:: { "OptionGroupsList": [ { "OptionGroupName": "default:oracle-ee-19", "OptionGroupDescription": "Default option group for oracle-ee 19", "EngineName": "oracle-ee", "MajorEngineVersion": "19", "Options": [], "AllowsVpcAndNonVpcInstanceMemberships": true, "OptionGroupArn": "arn:aws:rds:us-west-1:111122223333:og:default:oracle-ee-19" } ] } For more information, see `Listing the Options and Option Settings for an Option Group <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithOptionGroups.html#USER_WorkingWithOptionGroups.ListOption>`__ in the *Amazon RDS User Guide*.