<prompt> Phossy jaw is seen in which poisoning?MercuryYellow phosphorousRed phosphorousTetanus  <response>: ANSWER: B Yellow phosphorousREF: Textbook of Forensic Medicine and Toxicology by Nagesh Kumar Rao - Page 371Phossy jaw is a type of osteomyelitis of jaws observed in chronic cases of phosphorus poisoning. Incidence is common among the workers of phosphorus industries linked to yellow phosphorous, the key ingredient in strike-anywhere matches, who are exposed to phosphorus fumes. The process starts in a carious tooth and then spreads, causing severe necrosis of the lower jawNote: Yellow phosphorous is also known as white phosphorous 