This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: ENT
[{'content': 'All statement about Plummer-Vinson syndrome are true except: \nSelect and explain. \nA. Commonly leads to carcinoma in lower third of oesophagus, B. Common with iron deficiency, C. Common in females, D. Premalignant', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (a) Commonly leads to carcinoma in lower third of oesophagus(Ref. Sleisenger Gastrointestinal & Liver Disease, 8th ed.,; 851)Plummer-Vinson syndrome affects the postcricoid area and upper part of oesophagus.', 'role': 'assistant'}]