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: Pharmacology
Drug not used in SIADH is : 
Select and explain. 
A. Demeclocycline, B. Desmopressin, C. Restriction of free water intake, D. 3% NaCl
B: Desmopressin
Answer: B: Desmopressin 
Explanation: None