This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Subject name: Anatomy
[{'content': "'Chassaignac's tubercle' is: \nSelect and explain. \nA. Erbs point, B. Carotid tubercle on C6 vertebra, C. Found on First rib, D. Medial condyle of humerus", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B Carotid tubercle on C6 vertebraRef: Gray's, 41st ed. pg. 414, Color Atlas of Human Anatomy, pg. 446* Chassaignac's tubercle (carotid tubercle) is the other name of anterior tubercle of transverse process of C6 vertebra.* It is the longest tubercle of Cervical (C6) Vertebra.", 'role': 'assistant'}]