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: Pathology
[{'content': 'In which of the following conditions uniform dilation of esophagus is seen - \nSelect and explain. \nA. Scleroderma, B. Achalasia cardia, C. Dermatomysitis, D. All', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Achalasia cardia Achalasia cardia Achalasia cardia is a motor disorder of the esophageal smooth muscle, characterized by ? 1. Aperistalsis 2. Failure of relaxion of the LES with swallowing 3. Increased resting tone of LES", 'role': 'assistant'}]