Hi @Ashish Kumar,
Firstly, please confirm type of subscription which are you using Pay-As-You-Go or Free trial or student account?
If using an Azure trial subscription or a student subscription, it is not possible to deploy the NC-series A100. Once you upgrade to a paid plan, you may need to request a separate quota increase for GPU resources.
Please refer to this for more detail information- https://learn.microsoft.com/en-us/answers/questions/2157302/clarification-on-gpu-access-after-upgrading-azure?page=1&orderby=Helpful&comment=answer-1913356#newest-answer-comment
If you have any further queries, do let us know.
If you found this informative, please consider accepting an answer as a token of appreciation. And don't forget to give it a thumbs up 👍 if it was helpful.
Thank you!