Surgery 3rd constriction of the oesophagus is at the level of- A Left brunchus crossing the aorta B Where it pierces the diaphragm C Junction of the oesophagus and stomach D Cricopharynx 💡 Explanation 3rd constriction of the oesophagus is at the level of- ✓ Correct Answer: B. Where it pierces the diaphragm