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: Pharmacology
[{'content': 'Indicate the drug which does not improve lower esophageal sphincter tone or prevent gastroesophageal reflux, but is used as the first line treatment of gastroesophageal reflux disease : \nSelect and explain. \nA. Sodium alginate + aluminium hydroxide gel, B. Omeprazole, C. Mosapride, D. Metoclopramide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Increasing GI motility with prokinetic drugs (like metoclopramide and mosapride) or\nBy decreasing gastric acid secretion with PPIs like omeprazole.', 'role': 'assistant'}]