This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormalities of Development, Subject name: Pediatrics
[{'content': 'Persistence of this milestone beyond what age is considered abnormal? \nSelect and explain. \nA. 3 months, B. 5 months, C. 7 months, D. 9 months', 'role': 'user'}, {'content': "Answer: B \nExplanation: The given picture shows 'hand regard' i.e. the child observes his own hands intently. It appears at 12 weeks Its persistence beyond 20 weeks (5 months) is considered abnormal.", 'role': 'assistant'}]