<prompt> Water lily sign on chest X ray is seen in -TuberculosisHydatid cystCryptococcosisAspergillosis  <response>: Ans. is 4b i.e., Hydatid cysto Radiological signs of hydatid cyst of lungMeniscus signWater-lilly signCamalote signRising sun signSerpent signEmpty cyst sign 