You need to allow one of the users to view everything in the deployment but not make any changes. Which of the following RBAC roles would you provide? (Select the most appropriate option)

Answer options:

A.Desktop Virtualization Contributor
B.Desktop Virtualization Reader
C.Desktop Virtualization Host Pool Reader
D.Desktop Virtualization Application Group Reader

Correct Answer: B 
The Desktop Virtualization Reader is the specific role that allows you to view everything in the deployment but not make any changes. 

Option A is incorrect. The Desktop Virtualization Contributor role will allow the user to manage all aspects of the deployment.
Option B is correct. The Desktop Virtualization Reader is the specific role that allows you to view everything in the deployment but not make any changes.
Option C is incorrect. Host Pool Reader will allow the user to see everything in the host pool.
Option D is incorrect. Application Group Reader should be assigned if you want the user to get access to information about the various applications in the workspace.
Reference: 
To know more about Built-in roles for Azure Virtual Desktop, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/virtual-desktop/rbac?WT.mc_id=AZ-MVP-5004159