Which of the following is not an Extension for SUSE Linux Enterprise Server?

Which of the following is not an Extension for SUSE Linux Enterprise Server?

• Deveolpment Tools Extension
• High Availability Extension
• Enterprise Storage
• Live Patching 

EXPLANATION

SUSE Linux Enterprise High Availability Extension
SUSE Linux Enterprise Live Patching

SSUSE Enterprise Storage

SUSE Linux Enterprise WorkstationExtension