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: Social & Preventive Medicine
[{'content': 'Endemic ascitis is associated with the following: \nSelect and explain. \nA. Pyrrolizidine, B. Aflatoxin, C. Sanguinarine, D. Beta oxalylamino alanine (BOAA)', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pyrrolizidine', 'role': 'assistant'}]