This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Interstitial Lung Disease, Subject name: Radiology
Egg Shell Calcification" in chest X ray is seen in? 
Select and explain. 
A. Silicosis, B. Sarcoidosis, C. Treated Lymphoma, D. All above
D: All above
Answer: D: All above 
Explanation: ANSWER: (D) All aboveREF: Chapman 4th ed p. 148EGG SHELL CALCIFICATION:SilicosisPneumoconiosisSarcoidosisLymphoma following radiotherapyTB, Histoplasmosis, BlastomycosisAmyloidosis