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
Miliary mottling seen in – a) TBb) Sarcoidosisc) Silicosisd) P. carinii pneumonia 
Select and explain. 
A. abc, B. bc, C. acd, D. bcd
A: abc
Answer: A: abc 
Explanation: Causes of Miliary mottling :-

Infection :- Bacterial (TB, Brucellosis, Bronchopneumonia, Melioidosis), viral (varicella I chicken pox), Fungal (Histoplasmosis, Coccidiodomycosis, blastomycosis, cryptococcosis).
Cardiac :- Mitral stenosis, Pulmonary edema, multiple pulmonary infarct.
Pneumoconiosis :- Coal worker pneumoconiosis, silicosis.
Neoplastic :- Lymphangitis carcinomatosis, alveolar cell Ca., lymphoma, leukemia, metastasis.
Allergic :- Loeffler's syndrome, tropical eosinophilia.
Others :- IPF, RA, Sarcoidosis, Histocytosis-X, HMD, Haemosiderosis