This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
What&;s the name of the sign 
Select and explain. 
A. Egg shell calcification, B. Homans sign, C. Angle wing sign, D. Deep sulcus sign
A: Egg shell calcification
Answer: A: Egg shell calcification 
Explanation: Calcification Around the Periphery Lymph Nodes ; Most commonly seen in silicosis and coal-worker's pneumoconiosis. Also seen in sarcoid. Rarely in post-irradiated Hodgkin disease, blastomycosis, scleroderma, amyloid and histoplasmosis. Ref : David Sutton 9th ed