Which is the first non-succedaneous tooth to erupt into the oral cavity:
Mandibular central incisor.
Mandibular first molar.
Maxillary first molar.
Maxillary central incisor.
Mandibular central incisor is the first succedaneous tooth to erupt in the oral cavity.
Mandibular 1st molar is the first non-succedaneous tooth to erupt in the oral cavity.