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: Social & Preventive Medicine
Destroying of lead batteries releases all of the following contaminants except: 
Select and explain. 
A. Arsenic, B. Antimony, C. Lead, D. Mercury
D: Mercury
Answer: D: Mercury 
Explanation: The battery scrap obtained from the breaking process is a mixture of several substances: metallic lead, lead oxide (PbO), lead sulfate (PbSO4) and other metals such as calcium (Ca), copper (Cu), antimony (Sb), arsenic (As), tin (Sn) and sometimes silver (Ag). In order to isolate the metallic lead from this mixture, two methods may be applied: pyrometallurgical processes, also known as fusion-reduction methods, and hydrometallurgical processes, or electrolytic methods. It is also possible to combine the two and use a hybrid process. Ref :