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
Which of the following doesn't constitute the triad of Paterson  - Brown - Kelly syndrome? 
Select and explain. 
A. Mucosal Webs, B. Cheilosis, C. Iron deficiency anemia, D. Pallor
D: Pallor
Answer: D: Pallor 
Explanation: The triad of paterson - Brown - Kelly syndrome also know as pilmmer - Vinson syndrome is

Mucosal webs in the esophagus.
Iron deficiency anemia
Cheilasis and glossitis