This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatric Surgery, Subject name: Surgery
[{'content': 'Regression of midgut herniation during embryogenesis occurs at: \nSelect and explain. \nA. 6 weeks, B. 10 weeks, C. 16 weeks, D. 20 weeks', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Physiological umbilical hernia occurs at week 5 of intrauterine life. Regression of hernia occurs at week 10 Defect in regression causes omphalocele', 'role': 'assistant'}]