<prompt> True about acute carbolic acid poisoning isGreen colour urine is due to pyrocatechol phenolResults in local anesthesiaResults in thin friable mucosaProgressive weight loss, pigmentation of skin sclera  <response>: Phenol carbolic acid has local anesthetic propey because it destroys sensory nerve ending. Acute poisoning is called carbolism Dark colored urine, skin pigmentation, weight loss, loss of appetite are features of chronic poisoning called as phenolic marasmus. Oxidation of metabolites of phenol pyrocatechol hydroquinone provides green color to urine. Phenol forms leathery stomach mucosa i.e. increased thickness of mucosa thats why gastric lavage can be done. 