Final answer:
The statement is false; Azure virtual machine costs can vary due to factors like data transfer, additional services, storage, and region, even if the machines are of the same size.
Step-by-step explanation:
The statement that two Azure virtual machines of size B2S will always generate the same monthly costs is false. While both virtual machines may have the same base cost due to using the same size, the actual monthly costs can vary based on several factors, including but not limited to the amount of data transfer, additional features or services enabled, storage consumed, and the region in which the virtual machines are hosted. Usage patterns can also significantly affect costs, as Azure services are typically billed on a pay-as-you-go basis.