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': 'Pathology in achalasia cardia is in? \nSelect and explain. \nA. Excitatory neurons, B. Inhibitory neurons, C. Muscles, D. Neuromuscular junction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer-B. Inhibitory neuronsIt is due to dysfunction of inhibitory neurons containing nitric oxide and vasoactive intestinal polypeptide in the distal esophagus. The cholinergic innervation ofthe LES is intact or affected only in the advanced stage.There is neurogenic degeneration either idiopathic or due to infection.', 'role': 'assistant'}]