Final answer:
True, you can distinguish between GA services and services in public preview directly from the Azure portal.
Step-by-step explanation:
From the Azure portal, you can distinguish between services that are generally available, often referred to as GA (General Availability), and those that are in public preview. This means that true is the correct answer. Generally available services are fully supported by Microsoft and come with a Service Level Agreement (SLA). On the other hand, services that are in public preview are typically available for testing and evaluation purposes and may not be fully supported or subject to an SLA.