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
A person sustains head trauma leading to transaction of pituitary stalk. All can be consequence of this, except 
Select and explain. 
A. SIADH, B. Diabetes mellitus, C. Diabetes insipidus, D. Hyperprolactinemia
B: Diabetes mellitus
Answer: B: Diabetes mellitus 
Explanation: Answer is B (Diabetes mellitus): Insulin is a pancreatic hormone, not under the control of pituitary. Transection of the pituitary stalk would therefore in no way affect glucose levels or lead to diabetes mellitus.