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: Surgery
Hickey-Hare test is used to diagnose - 
Select and explain. 
A. Congenital pyloric stenosis, B. Duodenal atresia, C. Achlasia cardia, D. Diabetes insipidus
D: Diabetes insipidus
Answer: D: Diabetes insipidus 
Explanation: Ans. is 'd' i.e., Diabetes insipidus Hypeonic saline infusion test that induces plasma hyperosmolality. Used for distinguishing between different causes of polyuria and polydipsia.