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': 'What lies anterior to transverse sinus - \nSelect and explain. \nA. Aorta, B. Pulmonary artery, C. IVC, D. SVC', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Relation of transverse sinus\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Anterior- Ascending aorta, pulmonary trunk\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Posterior- Superior vena cava, atria\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Above- Bifurcation of pulmonary trunk\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Below- Upper surface of left atrium', 'role': 'assistant'}]