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': 'Nails is formed in which week of IUL – \nSelect and explain. \nA. 0 – 6 week, B. 10 –12 week, C. 14 – 18 week, D. 20 – 24 week', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]