This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Developmental-Behavioral Screening and Surveillance, Subject name: Pediatrics
[{'content': 'A child has a vocabulary of 10-15 words however the main mode of communication and social interaction continues to be non-verbal. What is the most likely developmental age of the child? \nSelect and explain. \nA. 12 months, B. 15 months, C. 24 months, D. 36 months', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. 15 monthsA 15 month old child has a vocabulary of 10-15 meaningful words. However at this time since less than 20% of the speech is understood, the main mode of communication remains non-verbal.', 'role': 'assistant'}]