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
ARDS true? 
Select and explain. 
A. Type 2 respiratory failure, B. Lung compliance decreased, C. Increase in diffusion capacity, D. none
B: Lung compliance decreased
Answer: B: Lung compliance decreased 
Explanation: ARDS is a clinical syndrome of severe dyspnoea of rapid onset, hypoxaemia and diffuse pulmonary infiltrates leading to respiratory failure.ARDS is characterised by Po2/Fio2(inspiratory O2 fraction)<200 mmHg.There will be no hypercapnia, so the patient will have type 1 respiratory failure. 
There will be a stiff-lung syndrome with collapse and decreased compliance of the lungs due to loss of surfactant.