@Ananth Ayyaswamy Thanks for reaching out to us, NC-series has been retired as this document - https://learn.microsoft.com/en-us/azure/virtual-machines/sizes/migration-guides/nc-series-retirement
The current available compute target is here - https://learn.microsoft.com/en-us/azure/machine-learning/concept-compute-target?view=azureml-api-2#supported-vm-series-and-sizes
Please be aware that some VM series, such as GPUs and other special SKUs, might not initially appear in your list of available VMs. But you can still use them, once you request a quota change. For more information about requesting quotas, see Request quota and limit increases. See the following table to learn more about supported series.
I hope this helps.
Regards,
Yutong
-Please kindly accept the answer if you feel helpful to support the community, thanks a lot.