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
Renin is secreted from: 
Select and explain. 
A. Juxtaglomerular apparatus, B. PCT, C. DCT, D. Collecting ducts
A: Juxtaglomerular apparatus
Answer: A: Juxtaglomerular apparatus 
Explanation: None