This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology Pa 2 (Helminthology), Subject name: Microbiology
Which of the following is ovoviviparous? 
Select and explain. 
A. Strongyloides, B. Trichinella, C. Enterobius, D. Ascaris
A: Strongyloides
Answer: A: Strongyloides 
Explanation: Nematodes that lay eggs from which larvae immediately hatch out. So bih of larvae instead of eggs are called viviparous. Strongyloides stercoralis is ovoviviparous.