Final answer:
Azure resources can access other resources across different resource groups. Resource groups are organizational tools, not boundaries for access or communication between resources.
Step-by-step explanation:
The statement that Azure resources can only access other resources in the same resource group is false. Azure resources, such as virtual machines and databases, are not restricted to communicating only with resources within the same group; they can also interact with resources in different resource groups across the same region or even across multiple regions, depending on network configurations and resource settings. Resource groups are mainly used as a means to organize resources for easy management, categorization, billing, and access control.