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: Microbiology
Infective stage of hook worm is: 
Select and explain. 
A. Trophozoite form, B. Filiform larva, C. Cyst, D. None
B: Filiform larva
Answer: B: Filiform larva 
Explanation: Ans. b. Filiform larva