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
In the majority of situations, the first deciduous tooth to erupt is the: 
Select and explain. 
A. Mandibular central incisor, B. Mandibular first molar, C. Maxillary central incisor, D. Maxillary second molar
A: Mandibular central incisor
Answer: A: Mandibular central incisor 
Explanation: None