Pediatrics Growth, Development, and Behavior 8bc76adc Milk teeth--Total no. in human being: A 20 B 28 C 32 D 24 High-Yield Explanation a. 20(Ref: Nelson's 20/e p 1768-1771, Ghai 8/e p 11)Primary dentition comprises of 20 teeth, which begins at 6 months of age and completes by 3 years.