Which of the following represents the most likely cause of manganese toxicity?

Question

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Inhalation of dust contaminated with manganese is the most likely cause of manganese toxicity. Manganese toxicity is more commonly seen in individuals working in industries where they are exposed to manganese dust, such as mining or welding. It is less commonly seen in individuals who consume foods or supplements with high levels of manganese, as the body can regulate the amount of manganese absorbed through the digestive system. Genetic defects may also lead to increased absorption of manganese, but this is rare.

Which of the Following Represents the Most Likely Cause of Manganese