You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is 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: and explain in detail?
Answer is C (Pulmonary Embolism): Sudden onset of Dyspnea and Chest Pain following injury, surgery or immobilization strongly suggests a diagnosis of pulmonary thromboembolism.