Final answer:
The question addresses the use of a glucose tolerance test (GTT) to diagnose diabetes mellitus and differentiate between insulin dependent or independent types of the disease through further testing such as ITT and GuTT.
Step-by-step explanation:
The question seems to be related to the diagnosis of diabetes mellitus using the glucose tolerance test (GTT).
When the GTT indicates hyperglycemia, it means that the glucose levels in the blood are higher than normal, which can confirm a diagnosis of diabetes mellitus.
Post diagnosis, to determine the type of diabetes, whether it is insulin dependent or independent, additional tests such as the Insulin Tolerance Test (ITT) and the Glucagon Tolerance Test (GTT) may be conducted.
In a broader medical context, the mentioned 'GD' could refer to diseases such as Parkinson's disease or Grave's disease, but in the context provided, it's clear that it refers to glucose testing related to diabetes.
Other medical terms mentioned like acromegaly are related to different conditions, and their symptoms, such as hyperglycemia or hypoglycemia, help in identifying the specific disease.