2620. Which of the following is dental formula of a 9 years old child_____________? September 27, 2025 by Admin A. 6 EDC21/ 6EDC21 B. 6EDCBA/ 6EDC21 C. EDC21/EDC21 D. 76EDC21/ 7EDC21 ✅ The correct answer is option A. 6 EDC21/ 6EDC21.