This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Surgery
All are risk factors of esophageal squamous cell carcinoma except: 
Select and explain. 
A. GERD, B. Achalasia cardia, C. Alcohol, D. Smoking
A: GERD
Answer: A: GERD 
Explanation: GERD is risk factor for Adenocarcinoma esophagus Risk Factors for SCC Esophagus - Alcohol - Smoking - Zenker's diveicula - Achalasia cardia - Intake of Nitrites Nitrates Nitrosamine - Fungal toxins - HPV infections (16, 18, 31, 33) - Plummer- Vinson syndrome - Hot liquid ingestion - Tylosis Palmaris & Plantaris - Deficiency of MO - Molybdenum Z - Zinc A -VITAMIN A - Bulimia nervosa