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': 'Commonest cause of abdominal pain in children is - \nSelect and explain. \nA. Porphyria, B. Worm colic, C. Lead poisoning, D. Appendicitis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. :D.)Appendicitis. The most common medical cause of Acute abdominal pain in children is gastroenteritis, and the most common surgical cause is appendicitis Differential Diagnosis of Acute Abdominal Pain by Predominant Age:', 'role': 'assistant'}]