This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Paterson Brown Kelly syndrome is characterized by all except \nSelect and explain. \nA. Premalignant, B. Lower esophageal web, C. Iron deficiency anemia, D. Common in female', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Upper esophageal/ Post cricoid webs are seen . ref - Harrisons internal medicine 20e pg 566 , davidson medicine 23e pg796', 'role': 'assistant'}]