This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
captopril test is used as a diagnostic test for ? 
Select and explain. 
A. renovascular hypeension, B. postural hypotension, C. acute congestive hea failure, D. MI
A: renovascular hypeension
Answer: A: renovascular hypeension 
Explanation: ref : kd tripathi 8th ed