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
Loeffler's syndrome is characterized by - 
Select and explain. 
A. Transient, migratory pulmonary infiltrations, B. Fibrosis in the pulmonary apices, C. Fibrosis in the base of one or both lungs, D. Miliary mottling
A: Transient, migratory pulmonary infiltrations
Answer: A: Transient, migratory pulmonary infiltrations 
Explanation: None