This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
The most common cause of preventable Hospital Death is- 
Select and explain. 
A. Acute Pulmonary' Embolism, B. Heart Failure, C. Myocardial infarction, D. Cancer
A: Acute Pulmonary' Embolism
Answer: A: Acute Pulmonary' Embolism 
Explanation: Ans. is 'a' i.e.. Acute Pulmonary Embolismo Acute Pulmonary! Embolism is the most common cause of Preventable Hospital DeathAcute Pulmonary Embolism is the third most common cause of hospital death in the united states after heart failure and cancer.Acute Pulmonary Embolism is the most common cause of preventable hospital death.Acute Pulmonary Embolism is the most common cause of death after surgery in a surgical patient.