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
Aldosterone antagonists are not useful in the treatment of: 
Select and explain. 
A. Hypertension., B. Congestive heart failure., C. Gynaecomastia., D. Hirsutism.
C: Gynaecomastia.
Answer: C: Gynaecomastia. 
Explanation: Aldosterone antagonists cause gynecomastia as an adverse effect.