This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Weight loss may be seen in all of the following except - 
Select and explain. 
A. Uremia, B. Pheochromocytoma, C. Adrenal insufficiency, D. Insulinoma
D: Insulinoma
Answer: D: Insulinoma 
Explanation: None