This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Esophagus, Subject name: Surgery
[{'content': "Mackler's triad consists all, except? \nSelect and explain. \nA. Thoracic pain, B. Dyspnea, C. Cervical subcutaneous emphysema, D. Vomiting", 'role': 'user'}, {'content': "Answer: B \nExplanation: Mackler's triad Thoracic pain Vomiting Cervical subcutaneous emphysema Seen in Boerhaave syndrome", 'role': 'assistant'}]