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': 'Which of the following are the first incisors to erupt in an infant – \nSelect and explain. \nA. Lower central, B. Lower lateral, C. Upper central, D. Upper lateral', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 4-7 months old: The first baby teeth usually begin to break through (erupt) the gums at around 6 months old.\nThis can occur anywhere between four and seven months.\nAs a general rule, the first teeth to erupt are the two in the front bottom.\nThese are called the lower central incisors.', 'role': 'assistant'}]