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: Medicine
Lower lobe fibrosis is seen in : 
Select and explain. 
A. Silicosis, B. Sarcoidosis, C. Cystic Fibrosis, D. Asbestosis
D: Asbestosis
Answer: D: Asbestosis 
Explanation: Answer is D (Asbestosis): Lower lobe fibrosis is seen in Asbestosis. Silicosis, Sarcoidosis and Cystic Fibrosis are all associated with Upper Lobe Fibrosis Upper Lobe Fibrosis Fibrotic Disease Old Granulomatous Infection (Tuberculosis; Histoplasmosis; Coccidioidomycosis) Sarcoidosis Silicosis, Berylliosis Coal Worker's Pneumoconiosis Ankylosing Spondylitis Radiation Pneumonitis Chronic Hypersensitivity Pneumonitis Airway Disease Cystic Fibrosis Allergic Bronchopulmonary Aspergillosis (ABPA) Fibrotic Disease Idiopathic Pulmonary Fibrosis Asbestosis Collagen Vascular Disease (SLE; Systemic Sclerosis; RA) Drugs (Busulphan; Bleomycin; Methotrexate etc.) Airway Disease Chronic Aspiration Basal Bronchiectasis