This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Byssinosis is caused due to inhalation of: 
Select and explain. 
A. Cotton fibre dust, B. Coal dust, C. Silica dust, D. Asbestos
A: Cotton fibre dust
Answer: A: Cotton fibre dust 
Explanation: Byssinosis is caused due to inhalation of cotton fibre dust over long periods of time. It leads to pneumoconiosis causing chronic lung disease. Ref: Park 21st edition, page 747. Chapter: Occupational health.