Q. How many human teeth appear twice during the life span of an individual?
A) 16
B) 32
C) 22
D) 20
Explanation
In human, 20 teeth (incisor, canine, premolar) are diphyodont, $i.e.,$ grow twice in life and 12 teeth (molars) are monophyodont, $i.e.,$ grow once in life.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.