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: Anatomy
[{'content': 'Which of the following is related to mediastinal pa of right lung ? \nSelect and explain. \nA. Arch of aoa, B. SVC, C. Pulmonary trunk, D. Left ventricle', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is "b.\'\' i.e., SVC', 'role': 'assistant'}]