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
Dosage of albendazole in ascariasis is : 
Select and explain. 
A. 400 mg once, B. 400 mg bd for one day, C. 400 mg tds for one day, D. 400 mg bd for 5 days
A: 400 mg once
Answer: A: 400 mg once 
Explanation: None