This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
Which of the following is associated with destruction of myenteric plexus? 
Select and explain. 
A. Hirschsprung disease, B. Secondary Achalasia, C. HPSS, D. GIST
B: Secondary Achalasia
Answer: B: Secondary Achalasia 
Explanation: 12 Ans. is 'b' i.e., Secondary achlasia * Secondary achalasia may arise in Chagas disease, in which Trypanosoma cruzi infection causes destruction of the myenteric plexus, failure of peristalsis, and esophageal dilatation.