This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Esophageal disorders, Subject name: Pathology
Which of the following is not a risk factor for carcinoma of the esophagus? 
Select and explain. 
A. Chronic alcohol use, B. H. pylori infection, C. Chronic GERD, D. Plummer Vinson syndrome
B: H. pylori infection
Answer: B: H. pylori infection 
Explanation: Barrett esophagus develops in patients with chronic GERD and represents columnar metaplasia of the esophageal squamous mucosa. Barrett esophagus is a risk factor for development of esophageal adenocarcinoma. Esophageal squamous cell carcinoma is associated with alcohol and tobacco use, povey, caustic esophageal injury, achalasia, tylosis, and Plummer-Vinson syndrome. Some serotypes of Helicobacter pylori are associated with decreased risk of esophageal adenocarcinoma. Helicobacter pylori infection can be a risk factor for development of MALT lymphoma in stomach.