This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Which of the following disease causes Achalasia 
Select and explain. 
A. Kala azar, B. Chaga's disease, C. KFD, D. Schistosomiasis
B: Chaga's disease
Answer: B: Chaga's disease 
Explanation: Answer- B. Chaga's diseaseAchalasia cardia is a motor disorder of the esophageal smooth muscle.Classical clinical symptom is progressive dysphagia for both solids and liquids. Dysphagia is worsened by emotional stress and hurried eating.Regurgitation and pulmonary aspiration occur because of retention of large volumes of saliva and ingested food in the esophagus.Esophagitis with ulceration may occur with chronic retention of food.Pain is infrequent in classical achlasia but a variant called vigrous achlasic is characterized by chest pain and esophageal spasms that generate non-propulsive high-pressure waves in the body ofthe esophagus.