<prompt> Peripheral neuritis with characteristic wrist drop or foot drop is seen in:Lead poisoningMercury poisoningCopper poisoningBismuth poisoning  <response>: Lead intoxication is manifested by serious gastrointestinal disturbances which include nausea, vomiting, colic, and constipation. A peripheral neuritis also develops which may produce the characteristic wrist-drop or foot-drop. Ref: Shafers textbook of oral pathology 7th edition page 558 