This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Triad of Plummer Vinson syndrome includes all of the following except: 
Select and explain. 
A. Iron Deficiency Anaemia, B. Dysphagia, C. Atrophic Glossitis, D. Koilonychia
D: Koilonychia
Answer: D: Koilonychia 
Explanation: Koilonchyia is not pa of Plummer Vinson Syndrome. Plummer-Vinson syndrome (iron deficiency, angular stomatitis, glossitis and dysphagia) raises the risk of oral squamous cell cancer and esophageal cancer at all the post-cricoidal tissue web&;- Harrison Plummer Vinson Syndrome Plummer-Vinson syndrome typically describes iron-deficiency anemia and dysphagia caused by the formation of a keratinized web. Plummer-Vinson Syndrome Iron Deficiency anemia Dysphagia (due to Esophageal webs or Hypopharyngeal webs), and Atrophic glossitis/Angular stomatitis Plummer-Vinson syndrome, also known as the Paterson-Brown-Kelly Syndrome, predisposes to Hypopharyngeal squamous cell carcinoma. The condition is more common in women and is a recognized risk factor for post cricoid Hypopharyngeal carcinoma. Ref: Harrison&;s 19th edition Pgno: 237