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: Medicine
Chinese herb nephropathy is caused by 
Select and explain. 
A. Mushroom, B. Lead poisoning, C. Aristolochic acid, D. Tenofovir
C: Aristolochic acid
Answer: C: Aristolochic acid 
Explanation: Aristolochic acid causes Chinese herb nephropathy and Balkan nephropathy.