This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
[{'content': 'Vocabulary of a 2-year-old child is: \nSelect and explain. \nA. 20 words, B. 30 words, C. 100 words, D. 200 words', 'role': 'user'}, {'content': "Answer: C \nExplanation: c. 100 words(Ref: Nelson's 20/e p 65-77, Ghai 8/e p 52-53)Vocabulary at 18 months is 10-15 words, while at 2 years, it is 50-100 words.", 'role': 'assistant'}]