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: Forensic Medicine
[{'content': 'Mercury will affect which pa of kidneys: Al 07 \nSelect and explain. \nA. PCT, B. DCT, C. Collecting duct, D. Loop of Henle', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. PCT', 'role': 'assistant'}]