The following release pipeline has been defined in Azure DevOps. 

The Artifacts section has been defined to pick up the artifacts from a build pipeline defined in Azure DevOps. The source code which is being build is an ASP.Net Core based solution. The application needs to be built on a Windows platform. 
You have to ensure that the code released in the “Staging” stage is released to an Azure Web App instance named “teststagingweb”. Where would you enable this setting? 

Answer options:

A.In the (1) Stages section
B.In the (2) pre-conditions section
C.In the (3) job/task section
D.In the (4) post-condition section

Answer – C 
You can implement this in the job/task section. If you go to this section, you can add a task of “Deploy Azure App Service”. 

Here you can define the App Service Type as “Web App on Windows”. And then, you can define the App Service name. 
Since this is clear from the implementation, all other options are incorrect. 
For more information on build and release tasks, please visit the below URL- 

https://docs.microsoft.com/en-us/azure/devops/pipelines/process/tasks?view=azure-devops&tabs=yaml