This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Snow storm appearance on USG is seen in: 
Select and explain. 
A. Hydatidiform mole, B. Ectopic pregnancy, C. Anencephaly, D. None of the above
A: Hydatidiform mole
Answer: A: Hydatidiform mole 
Explanation: The ultrasound appearance is diagnostic described as snow storm appearance.It may also show the presence of theca lutein cyst in the ovaries .In paial mole ultrasound may show a foetus.Helps in early diagnosis of molar pregnancy (refer pgno:170 sheila textbook of obstetrics 2 nd edition)