<prompt> Phossy jaw is caused by-White phosphorusRed PhosphorusArsenicAntimony  <response>: Ans. is a i.e., White Phosphorus o Phossy jaw is caused by phosphorus poisoning. All phosphorus poisoning are caused by white yellow phosphorus Red phosphorus is nontoxic.Phosphorus poisoningo Phosphorus is a protoplasmic poison affecting cellular oxidation and causing anoxic necorbiosis, classically affecting liver. It increases fat deposition and inhibits glycogen deposition in liver. It is used in fire works Diwali poisoning and as rat poison. Lethal dose is 60-120 mg.o Phosphorus occurs in two formsWhiteyellow phosphorus: It is white, and becomes yellow on exposure to air. It is translucent, waxy, luminous and crystalline cylinders. It has garlic like odor. It is insoluble in water and luminous in dark. Its fumes show phosphorescence.Red phosphorus : It is reddish brown, inert, odourless and tasteless. It is nontoxic thus poisoning occurs only due to white phosphorus. It is put on the sides striking surface of match box along with powdered galss.Acute poisoningo It has following stages :1st Stage 