This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
The given graph likely depicts 
Select and explain. 
A. Emphysema, B. Interstitial lung disease, C. Normal study, D. Kyphosis
A: Emphysema
Answer: A: Emphysema 
Explanation: The curve is shifted downward and to the right (compliance is decreased) by pulmonary edema and interstitial pulmonary fibrosis. Pulmonary fibrosis is a progressive restrictive airway disease in which there are stiffening and scarring of the lung. The curve is shifted upward and to the left (compliance is increased) in emphysema. Reference: Ganong's Review of Medical Physiology; 25th edition; Page no: 630