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
Persistence of this milestone beyond what age is considered abnormal? 
Select and explain. 
A. 3 months, B. 5 months, C. 7 months, D. 9 months
B: 5 months
Answer: B: 5 months 
Explanation: 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.