This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Triangles of Neck, Subject name: Anatomy
[{'content': 'Which structure can be felt at the lower part of the medial border of stemocleidomastoid:- \nSelect and explain. \nA. subclavian artery, B. Common carotid artery, C. Internal mammary artery, D. Maxillary artery', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Common carotid artery", 'role': 'assistant'}]