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: Surgery
[{'content': 'True about carcinoma esophagus is- \nSelect and explain. \nA. Most common site is lower end, B. Both adeno and suqamous cell carcinoma occur, C. Commonest histology is adenocarcinoma, D. More common in females', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]