This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Which of the following agents is useful for the oral treatment ofboth pituitary as well as renal diabetes insipidus? 
Select and explain. 
A. Vasopressin, B. Hydrochlohiazide, C. Chlorpropamide, D. Carbamazepine
B: Hydrochlohiazide
Answer: B: Hydrochlohiazide 
Explanation: (Ref: KDT 6/e p577, 578) Thiazides are useful in the treatment of central as well as nephrogenic DI. Vasopressin, chlorpropamide and carbamazepine are useful only in central DI.