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What is Erethism occur in and explain in detail?
Ans is 'a' i.e. Hg(Mercury) Erethism: is a peculiar disturbance of the personality characterized by shyness irritability, tremors, loss of memory and insomnia.Other imp. Points about mercury :Most poisonous salt of mercury* - Mercuric chlorideAcute poisoning causes nephrotoxicity *Chronic poisoninga blue-black line on the gums as with lead poisoningMercuria lentis*is a peculiar eye change due to brownish deposits of mercury in the lens. It is bilateral and has no effect on visual acuity.Tremors are seen and are k/a Hotter*s shake* or glass blowers shake*Erethism is seenAcrodynia* is seen.