You have just set up a Windows virtual machine in Azure. The machine is currently in the stopped state. The details of the machine are given below. 

The virtual machine currently has one disk assigned to the machine which is the OS level disk. 

Would you be charged for the underlying disks attached to the virtual machine in its current state?

Answer options:

A.Yes
B.No

Answer – A 
You are always charged for the OS disk attached to the virtual machine. 
The Microsoft documentation FAQ’s on virtual machines mention the following. 

For more information on the pricing for Azure Windows virtual machines, please visit the below URL- 

https://azure.microsoft.com/en-us/pricing/details/virtual-machines/windows/