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: Dental
[{'content': "Extraction of mandibular first molar in an 8 year old child is known as: \nSelect and explain. \nA. Wilkinson's extraction, B. Compensatory extraction, C. Serial extraction, D. Orthodontic extraction", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Wilkinson Extraction\xa0\nWilkinson advocated extraction of all the four first permanent molars between the age of 8 ½ & 9 years.\xa0\nThe basis of it is the fact that first molars are highly susceptible to caries.\xa0\nThe other benefits of extracting first molars at an early age are:\n\nTo avoid third molar impactions by providing additional space for their eruption.\xa0\xa0\nTo reduce crowding in the arch.', 'role': 'assistant'}]