This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory, Subject name: Medicine
Shock lung synonym is used for 
Select and explain. 
A. COPD, B. Alveolar proteinosis, C. ARDS, D. HMD
C: ARDS
Answer: C: ARDS 
Explanation: Ans. C. ARDSShock Lung/ARDS is a clinical syndrome caused by diffuse alveolar capillary and epithelial damage. There is usually rapid onset of life-threatening respiratory insufficiency, cyanosis, and severe arterial hypoxemia that is refractory to oxygen therapy and that may progress to multisystem organ failure. The histologic manifestation of ARDS in the lungs is known as diffuse alveolar damage.