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': 'Drug of choice for round worm \nSelect and explain. \nA. Albendazole, B. Metronidazole, C. Praziquantal, D. Mebendazole', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]