As a part of the fail-over process, you want to automate a rapid deployment and a new host pool with a large number of session hosts.Which of the following would you use to deploy the host pool. (Choose the best possible option)

Answer options:

A.Azure Portal
B.ARM Templates
C.PowerShell Scripts
D.Azure Site Recovery

Correct Answer: B 
ARM templates are a better option than the portal because they work with automation solutions. These templates can deploy a number of servers in parallel and add them to the Host Pool during the deployment, which makes it much quicker than PowerShell.Option A is incorrect. Azure Portal is not the best choice as ARM templates are better than portals as they work with automation solutions.
Option B is correct. ARM templates are a better option than the portal because they work with automation solutions.
Option C is incorrect. ARM templates are faster than PowerShell scripts.
Option D is incorrect. Azure site recovery is not the best solution.
Reference: 
To more about using ARM templates, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/virtual-machines/windows/quick-create-template?WT.mc_id=AZ-MVP-5004159