Dental Which of the following has the largest relative mesiodistal dimension of the root canal? A Maxillary Lateral incisor B Mandibular second premolar C Palatal root of maxillary 1st molar D Distal root of the mandibular 1st molar 💡 Explanation Which of the following has the largest relative mesiodistal dimension of the root canal? ✓ Correct Answer: D. Distal root of the mandibular 1st molar