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: Surgery
[{'content': 'All are true about Till-aux triad of mesentric cyst except \nSelect and explain. \nA. Swelling movement perpendicular to mesentry is restricted, B. Central area of dullness with zone of resonance all around, C. Soft fluctuant swelling in umbilical region, D. Painless abdominal swelling', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tillaux triad of mesetric cyst :\n\nCentral area of dullness with zone of resonance all around.\nSoft fluctuant swelling in umbilical region.\nSwelling moves perpendicular to mesentry freely.', 'role': 'assistant'}]