This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Sudden onset of a cough followed by increasing dyspnea is characteristic of \nSelect and explain. \nA. Pleural effusion, B. Lobar pneumonia, C. Myocardial infarct, D. Pneumothorax', 'role': 'user'}, {'content': "Answer: D \nExplanation: PneumothoraxPatients most commonly present with chest pain, often sharp and pleuritic and may leads to severe respiratory embarrassment or becomes dull and persistent.Dyspnea is the 2ndMC symptom.Less common symptoms include a nonproductive cough and ohopnea.Physical findings may be normal if the Pneumothorax is less than 25%.Characteristic physical finding includes diminished chest excursion and hyper-resonance on percussion of the affected side. Breath sounds are diminished to absent.(Refer: Harrison's Principles of Internal Medicine, 18thedition, pg no: 2181, 2221, 3212)", 'role': 'assistant'}]