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
A child has a vocabulary of 4–6 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 – 
Select and explain. 
A. 12 months, B. 15 months, C. 18 months, D. 24 months
B: 15 months
Answer: B: 15 months 
Explanation: Vocabulary of 4-6 words in addition to jargon is achieved by 15 months of age. However <20% of speech is understood and hence main mode of communication continnues to be non-verbal.