<prompt> A patient with rain drop pigmentation, which poisoning caused it -CopperArsenicLeadMercury  <response>: Ans. is b i.e.. Arsenic o Chronic arsenic poisoning causes patchy brown raindrop type pigmentationCharacteristic features of some poisoningPoisonFeaturesAlcoholMe Evans sign, morbid jealousyCocaineMagnan symptom or formication, jet black tongue cocaine bugs tactile hallucination, Acute MICannabisRun amok, amotivational syndromeAmphetamineParanoid hallucinatory features induced psychosisLSDBad trips, flash backPhencyclidineDissociative anaesthesia 