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 a transaction of pituitary stalk. All can be a consequence of this, except - 
Select and explain. 
A. SIADH, B. Diabetes mellitus, C. Diabetes incipidus, D. Hyperprolactinemia
B: Diabetes mellitus
Answer: B: Diabetes mellitus 
Explanation: Pituitary gland does not control the secretion of insulin so it plays no role in diabetes mellitus.