This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstetrical Ultrasonography in the Second Trimester, Subject name: Radiology
Snowstorm appearance in Ultrasound is seen in: 
Select and explain. 
A. Hydatiform mole, B. Twins, C. Hydronephrosis, D. Downs syndrome in fetus
A: Hydatiform mole
Answer: A: Hydatiform mole 
Explanation: Explanation:On ultrasound, the Hydatiform mole resembles a bunch of grapes ('cluster of grapes" or ''honeycombed uterus" or "snow-storm appearance) (See table below) Partial and Complete Hydatiform Mole PARTIAL MOLECOMPLETE MOLEFetus, Fetal vessels, PlacentaPresentAbsentKaryotype69 XXY (triploid)46 XXHydropic changesFocalMarkedMalignant potentialRare1 5-20%Ultrasound featuresFocal cystic spaces in placentaFetus and placenta are seenTransverse diameter of uterus increasesSnowstorm appearance