You have 1 host pool with 2 application groups added to a workspace titled Workspace1.Now, you create a new workspace named Workspace2 and a 3rd application group that should be available in Workspace2. Which of the following step would you follow?

Answer options:

A.Recreate Worksapce2 in the same region as Workspace1 and add the application group
B.Unregister the default desktop application group from Workspace1 and add it to Workspace2
C.Add the new Application Group to Workspace2
D.Create a new host pool

Correct Answer: D 
Application groups for a host pool can be assigned only to one workspace.For adding an application group to Workspace2, there is a need for a new host pool and the application group.
Option A is incorrect. Recreating Worksapce2 in the same region as Workspace1 and adding the application group won’t meet the goal.
Option B is incorrect. You don’t need to unregister the default desktop application group from Workspace1 and add it to Workspace2
Option C is incorrect. For adding an application group to Workspace2, there is a need for a new host pool and the application group.
Option D is correct. To meet the goal, you need to create a new host pool.
Reference: 
To know about how to manage app groups with the Azure portal, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/virtual-desktop/manage-app-groups