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': 'A distinctive clinical manifestation of a successful Rapid Maxillary Expansion is: \nSelect and explain. \nA. Anterior crossbite, B. Posterior crossbite, C. Midline diastema, D. Open bite', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Rapid maxillary expansion (RME) results in rapid correction of the cross-bite occurring in 2–6 weeks. A midline diastema may appear which is suggestive of the mid-palatal split. This diastema would close spontaneously due to the recoil of the stretched trans-septal group of gingival fibres.\nReference: Orthodontics: Diagnosis and Management of Malocclusion and Dentofacial Deformities 3rd O P Kharbanda, pdf no 2403', 'role': 'assistant'}]