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: Radiology
Egg shell" calcification in hilar nodes suggest: 
Select and explain. 
A. Asbestosis, B. Silicosis, C. Berylliosis, D. Baritosis
B: Silicosis
Answer: B: Silicosis 
Explanation: Silicosis