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
[{'content': 'Renin is secreted from: \nSelect and explain. \nA. Juxtaglomerular apparatus, B. PCT, C. DCT, D. Collecting ducts', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]