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 poison acts on: \nSelect and explain. \nA. Proximal convoluted tubule, B. Distal convoluted tubule, C. Loop of Henle, D. Collecting ducts', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Proximal convoluted tubule', 'role': 'assistant'}]