2394. Among the difference between teeth in the decidous and the permanent dentition is that_____________?

A. Buccal surfaces of the permanent molars are flatter
B. Cervical ridges are more pronounced in permanent molars
C. Root trunks of decidous teeth are larger compared with their overall root lengths
D. Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths
✅ The correct answer is option D. Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths.

2400. Main function of salivary duct is_______________?

A. To convey the saliva secreted by the terminal secretory units to oral cavity
B. Antibacterial action by secreting lysoenzymes and lactoferrin
C. Synthesis of secretory glycoproteins by Kallidrein an enzyme in striated duct cells
D. None of the above
✅ The correct answer is option A. To convey the saliva secreted by the terminal secretory units to oral cavity.