A patient comes with dysphagia and regurgitation. Manometry shows ineffective contractions in the Lower esophagus. Which of the following will not cause this condition: (A) Degenerative neurons, (B) Chagas disease, (C) Herpes zoster, (D) GERD
Answer is D. Condition is achalasia. There are two theories for achalasia

Degenerative neurons
Infection of the neurons caused by herpes zoster and chagas disease