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': 'First deciduous teeth usually comes around 6 months of age. They are: \nSelect and explain. \nA. Upper central incisors, B. Lower central incisors, C. Lower lateral incisors, D. Molars', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Primary teeth generally begin to erupt at about 6 months of age. The mandibular central incisors usually erupt before the maxillary incisors. The first teeth may appear as early as age 3-4 months or as late as age 12-16 months. Ref: Klein U. (2012). Chapter 17. Oral Medicine & Dentistry. In W.W. Hay, Jr., M.J. Levin, R.R. Deterding, J.J. Ross, J.M. Sondheimer (Eds), CURRENT Diagnosis & Treatment: Pediatrics, 21e.', 'role': 'assistant'}]