Which one of the following pairs is mismatched?
Minamata disease is a neurological disease caused by severe mercury poisoning. Fluoride poisoning of groundwater and drinking water causes skeletal and dental fluorosis. Arsenic poisoning as a result of groundwater contamination causes skin disease, gangrene and cancer. Goitre is a case of iodine deficiency. Lead poisoning usually occurs over a span of months or years. It can cause severe mental and physical impairment.