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
Stimulation of which receptor will release renin? 
Select and explain. 
A. Alpha - 1, B. Alpha - 2, C. Beta -1, D. Beta -2
C: Beta -1
Answer: C: Beta -1 
Explanation: beta-1 receptors