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: Radiology
In which of the following condition does an ultrasonography shows a Snow storm appearance? 
Select and explain. 
A. Tubal pregnancy, B. Abdominal pregnancy, C. Hydatidiform mole, D. Fibroid
C: Hydatidiform mole
Answer: C: Hydatidiform mole 
Explanation: Classic sonographic appearance of a complete mole: "Snowstorm" or "granular" appearance Central heterogenous mass with numerous anechoic (cystic) spaces Low resistance aerial and venous flow Absence of embryo or fetus When sonographic appearance and hCG levels are suspicious for hydatidiform mole, the diagnosis should be confirmed by histology.