Black-foot disease is caused due to ground water contaminated with excess of
A
Nitrate
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B
Fluoride
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C
Arsenic
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D
Sulphur
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E
Mercury
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Solution
The correct option is E Arsenic The Blackfoot disease affects the peripheral vascular system. It is endemic in nature. It is associated with the consumption of inorganic arsenic from the artesian wells. Arsenicosis is caused by exposure over a period of time to arsenic in drinking water. Arsenic contamination in water may also be due to industrial processes, such as those involved in mining, metal refining, and timber treatment. WHO's guideline value for arsenic in drinking water is 0.01 mg /litre.