This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
[{'content': 'Stony dull note on percussion is characteristic of- \nSelect and explain. \nA. Pleural effusion, B. Consolidation, C. Pleurisy, D. Tuberculosis cavity', 'role': 'user'}, {'content': "Answer: A \nExplanation: Stony dullness will be obtained in pleural effusion over the lung base due to the accumulation of serous fluid in the pleural cavity.In left sided pleural effusion,there will be loss of tympanicity of Traube's space.The clinical features of pleural effusion include pleuritic chest pain,dyspnoea,tracheal and mediastinal shift to the opposite side,diminished or absent breath sounds,aegophony and bronchial breath sounds just above the level of effusion. Consolidation is characterised by dull percussion note,tuberculous cavity by impaired percussion note. Reference:Davidson's Medicine-22nd edition,page no:645,661.", 'role': 'assistant'}]