Which of the following options will assign the largest number of users to the smallest number of session hosts?

Answer options:

A.Depth-first in a personal host pool
B.Breadth-first in a pooled host pool
C.Breadth-first in a personalhost pool
D.Depth-first in a pooled host pool
E.Breadth-first in a public host pool
F.Depth-first in a public host pool

Correct Answer: D 
Depth-first load balancing in Azure virtual desktop consolidates new connections to the session host with the greatest number of users until the max session limit is reached.Load balancing options are not available with personal host pools.Option A is incorrect. Load balancing options are not available with personal host pools. 
Option B is incorrect. The breadth-first load balancing option will distribute new user sessions across all available session hosts in the host pool. So, it is the incorrect option.
Option C is incorrect. Load balancing options are not available with personal host pools. 
Option D is correct. Depth-first load balancing in Azure virtual desktop consolidates new connections to the session host with the most number of users until the max session limit is reached. 
Option E is incorrect. Host pools are of two types: Personal or Pooled. There is nothing like a public host pool. So this option is invalid.
Option F is incorrect. Host pools are of two types: Personal or Pooled. There is nothing like a public host pool. So this option is invalid.
Reference: 
To know more about load balancing options, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/virtual-desktop/configure-host-pool-load-balancing