This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Radiology
Opacity with nodular & Irregular calcification is seen in: 
Select and explain. 
A. Pulmonary Histiocytosis, B. Sarcoidosis, C. Scleroderma, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. D. All of the aboveAll these conditions are associated with eggshell calcificationHoney combing is seen in:a. Histiocytosis Xb. Tuberous sclerosisc. Sarcoidosisd. Pneumoconiosise. Cryptogenic Fibrosing alveolitisf. Sclerodermag. Rheumatoid arthritish. Lipoid pneumoniai. Lymph angiomatosisj. AmyloidosisCrazy pavement appearance is seen in alveolar proteinosis