This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pediatrics
[{'content': 'The development of septal defects in the fetal hea occurs at \nSelect and explain. \nA. 3-5 weeks, B. 6-8 weeks, C. 9-12 weeks, D. 13-15 weeks', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fetal hea septal defect develop by 6-8 weeks. Ref : Ghai essential of pediatrics, eighth edition, p.no: 402', 'role': 'assistant'}]