A 33-year-old man complains that his chest hurts when he eats, especially when he eats meat. An x-ray film shows a dilated esophagus, and achalasia is

[Kathryn]

#june2020mccqe1

A 33-year-old man complains that his chest hurts when he eats, especially when he eats meat. An x-ray film shows a dilated esophagus, and achalasia is suspected. Esophageal manometry is used to confirm the diagnosis. Swallowing induced relaxation is reduced at which anatomic location in this man?
(A) Lower esophageal sphincter
(B) Lower esophagus
(C) Middle esophagus
(D) Pharynx
(E) Upper esophageal sphincter
(F) Upper esophagus