This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Anatomy
Phossy jaw is seen in chronic 
Select and explain. 
A. Sulphur poisoning, B. Chlorine poisoning, C. Fluirine poisoning, D. Phosphorus poisoning
D: Phosphorus poisoning
Answer: D: Phosphorus poisoning 
Explanation: Phossy jaw It is a type of osteomylitis of the jaws observed in chronic phosphorus poisoning. Frequent inhalation of fumes for many years may cause necrosis of the lower jaw in the region of a decayed tooth. It is common among workers, in phosphorus industries, who are exposed to phosphorus fumes Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 432