This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pathology
In which of the following conditions uniform dilation of esophagus is seen 
Select and explain. 
A. Scleroderma, B. Trypanosoma cruzi infection, C. Dermatomysitis, D. BD
D: BD
Answer: D: BD 
Explanation: In Trypanosoma cruzi infection& dermatomyositis uniform dilatation of oesophagus is seen Esophageal dilatation is a therapeutic endoscopic procedure that enlarges the lumen of the esophagus. ...Complications of esophageal dilatation include the following: Odynophagia, or painful swallowing. Hematemesis, or bloody vomit. Esophageal perforation. Mediastinitis.