You have deleted the QnA Maker service in Azure. With the next billing cycle, you did not expect to see the associated costs to show. However, to your surprise, you see some amount showed up. Your application is using a custom domain and autoscaling features. You are using more than fifteen indexes per service. You have been storing the state in memory. You work with Microsoft contact and conclude that some of the associated services will continue to accrue the cost until you delete them. 
Which two services would you choose to delete to avoid additional costs in the subsequent billing cycles?

Answer options:

A.Azure Table Storage
B.Azure Cognitive Search
C.Azure Resource Group
D.Azure App Service

Correct Answers: B and D
Option A is incorrect because Azure table storage would be used if you design and implement it to store the state in the table storage. In the scenario above, the state is stored in memory.
Option B is correct. While you create QnA maker service, Azure Cognitive Search service is also created. Since you are using more than fifteen indexes per service, you would be using a Standard tier. Unless you delete the Cognitive Search resource, you will continue to incur costs.
Option C is incorrect. Azure resource group is a container that holds resources for your solution. It does not have a cost associated with it.
Option D is correct. Azure App Service that uses autoscaling requires a Standard tier, and hence you would continue to incur costs if you do not delete it.
Reference:
To learn more about costs associated with cognitive resources, use the link given below: 

https://docs.microsoft.com/en-us/azure/cognitive-services/plan-manage-costs