This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Esophagus, Subject name: Surgery
The most common complication seen in hiatus hernia is: 
Select and explain. 
A. Esophagitis, B. Aspiration pneumonitis, C. Volvulus, D. Esophageal stricture
A: Esophagitis
Answer: A: Esophagitis 
Explanation: The most common complication seen in hiatus hernia is Esophagitis. Signs & Symptoms of hiatus hernia- Type I - Reflux Type II - Herniation of fundus leading to ischemia which can cause abdominal pain Type III - Reflux and Abdominal pain Type IV - High risk of ischemia and strangulation (Abdominal pain + increased risk of complications)