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