Anatomy Constrictions of esophagus when measured from upper incisors are present at A 15cm, 20cm, 40cm B 15cm, 25cm, 40cm C 20cm, 30cm, 40 cm D 30cm, 40cm, 60 cm 💡 Explanation Constrictions of esophagus when measured from upper incisors are present at ✓ Correct Answer: B. 15cm, 25cm, 40cm