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
[{'content': 'Snow Storm" appearance is seen in: \nSelect and explain. \nA. Ectopic pregnancy, B. H mole, C. Leiomyoma uterus, D. Abdominal pregnancy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: H mole', 'role': 'assistant'}]