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: ENT
True about plummer vinson syndrome: 
Select and explain. 
A. Web is M/C in lower esophagus, B. Web is M/C in Mid esophagus, C. Web is M/C in postcricoid region, D. It occurs due to abnormal vessels
C: Web is M/C in postcricoid region
Answer: C: Web is M/C in postcricoid region 
Explanation: Plummer-Vinson syndrome patients present with dysphagia due to web in the postcricoid region and due to incoordinated swallowing secondary to esophageal spasm