Correct Answer: iron dust

Solution : The correct option is iron dust .

Siderosis is a disease induced by inhaling iron or iron oxide particles, frequently caused by occupational exposure to iron dust or fumes. It primarily affects the lungs, causing inflammation, scarring and other respiratory complications. Workers in mining, welding and iron manufacturing are prone to this illness due to the significant risk of breathing iron-containing particles. Zenker characterised siderosis, a diseased condition affecting numerous organs, in 1866.