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
Thickening of pulmonary memb. is seen in 
Select and explain. 
A. Asthma, B. Emphysema, C. Bronchitis, D. Skeletal defect
A: Asthma
Answer: A: Asthma 
Explanation: None