2) A 35-year-old male presents to the emergency room with complaints of severe abdominal pain, vomiting, and diarrhoea. Upon further investigation, it is revealed that the patient works in a chemical laboratory and handles various heavy metals regularly. His symptoms worsen rapidly, with development of neurological symptoms including muscle weakness and paralysis. Laboratory tests reveal a high anion gap metabolic acidosis. Which of the following heavy metals is most likely responsible for his symptoms?
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