Final answer:
A) Diabetes mellitus The signs and symptoms mentioned in the question—polydipsia, polyuria, good appetite with weight loss, and blurred vision—are indicative of Diabetes mellitus, a condition resulting from insulin dysfunction causing high blood glucose levels.
Step-by-step explanation:
Polydipsia, polyuria, good appetite with weight loss, and blurred vision are signs and symptoms of Diabetes mellitus. Diabetes mellitus is a disease caused by problems with the pancreatic hormone insulin, resulting in high blood glucose levels. The symptoms of diabetes mellitus include polyuria (frequent urination), polydipsia (excessive thirst), polyphagia (increased hunger), and often weight loss despite a good appetite due to the ineffective use of glucose by the body's cells.
While types 1 and 2 diabetes both share these symptoms, type 1 can also present with symptoms such as the smell of acetone, nausea, vomiting, abdominal pain, lethargy, stupor, and hyperventilation, some of which are less common in type 2 diabetes. The out-of-control glucose levels affect kidney function, leading to dehydration from polyuria and triggering excessive thirst. The cells are 'starving' for glucose despite the high levels in the bloodstream, leading to persistent hunger.