This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Risk factors for active tuberculosis among persons who have been infected with tubercle bacilli 
Select and explain. 
A. Peptic ulcer, B. Silicosis, C. Leprosy, D. Acute renal failure
B: Silicosis
Answer: B: Silicosis 
Explanation: (B) Silicosis > Risk Factors for Active Tuberculosis among persons who have been infected with Tubercle BacilliFACTOR RISK/ODDSRELATIVE* Recent infection (<1 year)12.9* Fibrotic lesions (spontaneously healed)2-20* Comorbidity * HIV infection100* Silicosis30* Chronic renal failure/hemodialysis10-25* Diabetes2-4* Intravenous drug use10-30* Immunosuppressive treatment10* Gastrectomy2-5* Jejunoileal bypass30-60* Posttransplantation period (renal, cardiac)20-70* Malnutrition & severe underweight2