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': 'Constrictions in Esophagus are present at distance of (from incisor): \nSelect and explain. \nA. 12 cm, B. 25 cm, C. 28 cm, D. 36 cm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 25 cm', 'role': 'assistant'}]