This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
In ARDS, which type of respiratory failure occurs? 
Select and explain. 
A. Type I, B. Type II, C. Type III, D. Type IV
A: Type I
Answer: A: Type I 
Explanation: TYPE I: ACUTE HYPOXEMIC RESPIRATORY FAILUREThis type of respiratory failure occurs with alveolar flooding and subsequent intrapulmonary shunt physiology. Alveolar flooding may be a consequence of pulmonary edema, pneumonia, or alveolar haemorrhage.Type I respiratory failure occurs in clinical settings such as sepsis, gastric aspiration, pneumonia, near-drowning, multiple blood transfusions, and pancreatitis.Pulmonary edema can be fuher categorized as occurring due to elevated pulmonary microvascular pressures, as seen in hea failure and intravascular volume overload or ARDS ("low-pressure pulmonary edema,"Ref: Harrison 19e pg: 1731