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: ENT
[{'content': 'Repair of cleft lip should be undeaken at: \nSelect and explain. \nA. 4 weeks, B. 6 weeks, C. 8 weeks, D. 10 weeks', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Timing of Lip Repair: The classic "rule of tens" is still a reasonable guideline for lip repair: 10 weeks of age, a weight of 10 pounds, and hemoglobin of 10 have been considered prerequisites for lip repair. This is paly based on anesthetic safety, which is probably a little better with increased age. The timing of the lip repair must be individualized for the patient.', 'role': 'assistant'}]