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: Pediatrics
[{'content': 'Which of the following is earliest indicator of pathological gastroesophageal reflux in infants? \nSelect and explain. \nA. Postprandial regugitation, B. Respiratory symptoms, C. Upper GI bleed, D. Stricture esophagus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Presence of respiratory symptoms point towards pathological GERD.\nStricture esophagus and upper GI bleed are complications due to severe GERD.', 'role': 'assistant'}]