<prompt> A factory worker presented with tremors, personality change and a blue line in gum. Probable diagnosis is chronic poisoning with:LeadMercuryArsenicThallium  <response>: Ans. B. Mercury.Mad hatter disease is an occupational disease among hatmakers, caused by chronic mercury poisoning.Mental confusin, emotional disturbances, and muscular weakness, Intentional tremor Hatters shakes 