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
Chelating agent for copper, mercury, lead which is given by oral route: MAHE 12 
Select and explain. 
A. BAL, B. EDTA, C. Penicillamine, D. Succimer
C: Penicillamine
Answer: C: Penicillamine 
Explanation: Ans. Penicillamine