1. Thecodont, Diphyodont, Homodont
2. Thecodont, Diphyodont, Heterodont
3. Pleurodont, Monophyodont, Homodont
4. Pleurodont, Diphyodont, Heterodont
A baby boy aged two years is admitted to play-school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?
(1) Incisors
(2) Canines
(3) Premolars
(4) Molars