This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'The most common complication seen in hiatus hernia is not related-surgery \nSelect and explain. \nA. Volvulus, B. Esophagitis, C. Esophageal stricture, D. Aspiration pneumonitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]