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
A 60 year old woman with fracture neck of femur presents to the emergency depament a few days after her injury with sudden onset breathlessness and chest pain. The most likely diagnosis is: 
Select and explain. 
A. Myocardial Infarction, B. Deep Vein Thrombosis, C. Pulmonary Embolism, D. Pleuritis
C: Pulmonary Embolism
Answer: C: Pulmonary Embolism 
Explanation: Answer is C (Pulmonary Embolism): Sudden onset of Dyspnea and Chest Pain following injury, surgery or immobilization strongly suggests a diagnosis of pulmonary thromboembolism.