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: Anatomy
[{'content': 'Cells of kidney having secretory function \nSelect and explain. \nA. I cell, B. P cell, C. JG cell, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. i.e. JG cells', 'role': 'assistant'}]