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
[{'content': 'A 54 year old smoker man comes with severe hemoptysis weight loss and oligoahritis. Serial skiagram shows fleeting opacities. What is the diagnosis? \nSelect and explain. \nA. Allergic bronchopulmonary aspergillosis, B. Ca lung, C. Tb, D. All', 'role': 'user'}, {'content': "Answer: A \nExplanation: Answer is A ( Allergic bronchopulmonary aspergillosis): The presence of fleeting opacities on serial skiagrams is consistent with a diagnosis of Allergic bronchopulmonary Aspergillosis and Wegner's granulomatosis. Associated Oligoahritis however ours a diagnosis of Wegener's granulomatosis which is the single best answer of choice. Oligoaicular Ahritis is a feature of Wegner's granulomatosis and is not mentioned as a feature of ABPA. Pauciaicular (oligoaicular) or Polyaicular ahritis may be seen in Wegner's granulomatosis'. - Current Rheumatology 2nd/276, 279 Presence of fleeting opacities may be seen in ABPA and Wegner's granulomatosis Fleeting opacities in ABPA Fleeting opacities in Wegner's `Patients with ABPA typically have 'Focal infiltrates which may be fleeting fleeting infiltrates on chest X-ray' are seen' -- Radiology of Chest Disease -- Crofton and Douglas Respiratory Diseases The presence of Oligoaicular ahritis and age of presentation our a diagnosis of Wegener's granulomatosis.", 'role': 'assistant'}]