Which of the following is true for 8yr old boy.
Number of permanent teeth = (Age - 5 ) × 4
So, Number of permanent teeth = (8 - 5 ) × 4 = 12
8 Permanent, 16 Temporary tooth
4 Temporary, 20 Permanent tooth
12 Temporary, 12 Permanent tooth
4 Permanent, 20 Temporary tooth