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: Pathology
[{'content': "Which of the following doesn't constitute the triad of Paterson  - Brown - Kelly syndrome? \nSelect and explain. \nA. Mucosal Webs, B. Cheilosis, C. Iron deficiency anemia, D. Pallor", 'role': 'user'}, {'content': 'Answer: D \nExplanation: The triad of paterson - Brown - Kelly syndrome also know as pilmmer - Vinson syndrome is\n\nMucosal webs in the esophagus.\nIron deficiency anemia\nCheilasis and glossitis', 'role': 'assistant'}]