Which of the following URL can be used to create an Azure support request?

Answer options:

A.https://support.azure.com
B.https://portal.azure.com
C.https://support.microsoft.com
D.https://dev.azure.com

Answer – B 
You can launch a support request via the Azure portal. 
The Microsoft documentation mentions the following. 
Azure portal for commercial use is: https://portal.azure.com 
Since this is clear from the documentation, all other options are incorrect. 
For more information on creating an Azure support request, please visit the below URL- 

https://docs.microsoft.com/en-us/azure/azure-supportability/how-to-create-azure-support-request