This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Which of the following is viviparous - \nSelect and explain. \nA. Strongyloidis stercoralis, B. Trichinella spiralis, C. Enterobius, D. Ascaris', 'role': 'user'}, {'content': 'Answer: B \nExplanation: trichina worm Causative agent of trichinosis It is viviparous and releases first-stage larvae into the intestinal mucosa (refer pgno:153 baveja 3 rd edition)', 'role': 'assistant'}]