This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Joint Disorders, Subject name: Orthopaedics
What is the most common cause of death after total hip replacement? 
Select and explain. 
A. Infection, B. Deep vein thrombosis, C. Pulmonary embolism, D. Pneumonia
C: Pulmonary embolism
Answer: C: Pulmonary embolism 
Explanation: Cause of moality after joint replacement order is myocardial Infarction > cardiorespiratory arrest > thromboembolism