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: Pharmacology
[{'content': 'Dosage of albendazole in ascariasis is : \nSelect and explain. \nA. 400 mg once, B. 400 mg bd for one day, C. 400 mg tds for one day, D. 400 mg bd for 5 days', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]