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': 'Patterson Brown Kelly syndrome is characterised by all except - \nSelect and explain. \nA. Lower oesophageal web, B. Iron deficiency anemia, C. Common in adult female, D. Premalignant', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]