**Core Concept**
Phossy jaws, also known as phosphorus necrosis of the jaw, is a historical occupational disease affecting workers in the matchstick industry. It occurs due to chronic exposure to phosphorus vapors, leading to necrosis and resorption of the jaw bones.

**Why the Correct Answer is Right**
Phossy jaws result from the inhalation of phosphorus vapors, which contain phosphorus pentoxide (P4O10). This highly reactive compound reacts with water in the body to form phosphoric acid and phosphorus oxychloride, leading to local tissue damage and necrosis. The phosphorus vapors cause damage to the jaw bones by inducing an inflammatory response, which eventually leads to necrosis and resorption of the bone.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because phossy jaws are not associated with arsenic exposure, which is a different occupational hazard.
**Option B:** This option is incorrect because carbon monoxide poisoning does not cause necrosis of the jaw bones.
**Option C:** This option is incorrect because radium exposure is associated with radiation-induced bone cancer, not phossy jaws.

**Clinical Pearl / High-Yield Fact**
Phossy jaws are a classic example of an occupational disease caused by chronic exposure to a toxic substance, highlighting the importance of workplace safety and proper ventilation.

**Correct Answer:** D.