This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Lung Nodules and Masses, Subject name: Radiology
[{'content': 'Water lily sign is seen in: \nSelect and explain. \nA. Hydatid cyst of lung, B. Aspergilloma lung, C. T.B, D. Silicosis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans: A (Hydatid...) HYDATID LUNG Review of Radiology by Sumer Sethi 6th/59No or rare calcification in lungWater lily sign or Camalote sign (in chest X-ray)LUNG ECHINOCOCCOSIS Danhert Radiology manual 5th/493Water lily sign-completely collapsed crumpled cyst membrane floating on the cyst fluidSign ofCamalotteSerpent signCumbo signMeniscus signCrescent signHemartoma lung: Carney's triad & calcification-Danhert Radiology manual 5th/489Silicosis: eggshell calcification- WHO Manual of Radiological interpretation 1st/75", 'role': 'assistant'}]