<prompt> Banana and lemon sign is seen in which fetal anomalies:Neural tube defectHydrops fetalisTwinsIUD  <response>: Signs of Spina bifida on UltrasoundSmall biparietal diameter.Ventriculomegaly.Frontal bone scalloping or the so called lemon sign.Elongation and downward displacement of the cerebellum-the so called banana sign.Effacement or obliteration of the cisterna megna. 