This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2019, Subject name: Medicine
Tolvaptan is used for:- 
Select and explain. 
A. SIADH, B. Central DI, C. Von Wilebrand disease, D. Catecholamine resistant Shock
A: SIADH
Answer: A: SIADH 
Explanation: In SIADH, ADH increases so more activation of V2 receptor, so more water absorption. The patients suffer from dilutional hyponatremia. Option B: Managed by Desmopressin / Nasal spray Option C: Managed by Cryoprecipitate / VW Factor Option D: No definitive treatment, patient dies more often