Anatomy Esophagus is constricted at 4 anatomic locations. Narrowest pa of esophagus lies at which of the following constriction? A At the level of cricopharyngeal sphincter B At the crossing of aoic arch C At the crossing of left bronchus D At the level of opening in the diaphragm 💡 Explanation Esophagus is constricted at 4 anatomic locations. Narrowest pa of esophagus lies at which of the following constriction? ✓ Correct Answer: A. At the level of cricopharyngeal sphincter