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': 'Spacing between the maxillary deciduous teeth in a 6-year old child indicates: \nSelect and explain. \nA. Good growth, B. Class III tendency, C. Class II tendency, D. Presence of mesiodens', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Normal Features of Primary Dentition\n1. Spacing in deciduous dentition \na) Physiological spacing \n\nGeneralized spacing is very common in deciduous teeth. These spaces are called physiological spaces or developmental spaces.\nPhysiological generalized spacing is common and is usual and desirable in deciduous dentition to accommodate large succeeding permanent teeth.\nIt is average 4 mm in the upper arch and 3 mm in the lower arch.\nIt is possible to use spacing between lower deciduous teeth for predicting the degree of crowding. Absence of spaces in the primary dentition is an indication that crowding of teeth may occur in permanent dentition. Baume has described spaced and unspaced primary dentitions and the effect on future permanent incisor eruption.\n\nTextbook of orthodontics, gowri shankar 1st edition page 83', 'role': 'assistant'}]