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': 'A baby has recently developed mouthing but has not developed stranger anxiety. Likes and dislikes for food. What is the most appropriate age of this baby- \nSelect and explain. \nA. 3 months, B. 5 months, C. 7 months, D. 9 months', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 5 months Mouthing develops by 4 months, while stranger anxiety develops by 7 months. So, the age of this child is between 4 to 7 months. Amongst the given options best answer is 5 months.", 'role': 'assistant'}]