A team needs to deploy a web application on Azure using the Azure Web App service. The following are required- Send telemetry about the web application to Azure.
Scale the web application based on the status of availability-tests for the web application.
You have to define scaling rules. Which of the following would you define as the Metric source? 

Answer options:

A.Current resource
B.Storage queue
C.Service Bus Queue
D.Resource Type

Answer – D 
Here we have to base the scaling according to Application Insights. Hence, we have to choose the option as the Resource Type. 
Once you choose the Other resource, you can then choose the Resource type as Application Insights. 

Since this is clear from the implementation, all other options are incorrect. 
For more information on setting up scaling for your Azure web apps, please visit the following URL- 

https://docs.microsoft.com/en-us/azure/app-service/manage-scale-up