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': '"Snowman" sign is seen in: \nSelect and explain. \nA. TGV, B. TOF, C. TAPVC, D. Aoic dissection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e., TAPVC', 'role': 'assistant'}]