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': 'Vocabulary of 1.5 year old child is - \nSelect and explain. \nA. 1-10 words, B. 10-20 words, C. 20-30 words, D. 30-40 words', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 10-20 words", 'role': 'assistant'}]