Which one of the following pairs is mismatched?
Minamata disease is a case of mercury poisioning that happened in Japan. 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 period of months or years. It can cause severe mental and physical impairment. Young children are most vulnerable.