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: Pathology
[{'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: Pleural Effusion - Percussion findings Stony dullness with increased resistance and no shifting dullness below the level of fluid.Skodaic resonance (boxy note) just above the effusionObliteration of Traube&;s space in left side effusionGrocco&;s triangle: Triangular area of dullness against veebral column, at the base of opposite lung, due to collapse&; of lungEllis&;S&; shaped curve(Refer: Harrison's Principles of Internal Medicine, 18th edition, pg no: 2178-2180)", 'role': 'assistant'}]