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
[{'content': 'Which of the following is ovoviviparous? \nSelect and explain. \nA. Strongyloides, B. Trichinella, C. Enterobius, D. Ascaris', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nematodes that lay eggs from which larvae immediately hatch out. So bih of larvae instead of eggs are called viviparous. Strongyloides stercoralis is ovoviviparous.', 'role': 'assistant'}]