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: Anatomy
Aliskiren is a 
Select and explain. 
A. Endothelin receptor antagonist, B. Antiplatelet, C. Renin inhibitor, D. Diuretic
C: Renin inhibitor
Answer: C: Renin inhibitor 
Explanation: Aliskiren binds to the S3bp binding pocket of renin, essential for its activity . Binding to this pocket prevents the conversion of angiotensinogen to angiotensin I.