This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidneys and Body Fluids, Subject name: Physiology
[{'content': 'All of the following structures lie in the renal medulla, Except \nSelect and explain. \nA. Juxtaglomerular apparatus, B. Loop of Henle, C. Collecting duct, D. Vasa Recta', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Juxtaglomerular apparatus(Ref: Ganong, 25th ed/p.672)Structures that lie in renal medulla are,#Loop of Henle#Medullary collecting duct#Vasa recta', 'role': 'assistant'}]