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
Toxin causing endemic ascites 
Select and explain. 
A. BOAA, B. Pyrrolizidine alkaloids, C. Aflatoxin, D. Sanguinarine
B: Pyrrolizidine alkaloids
Answer: B: Pyrrolizidine alkaloids 
Explanation: None