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
Which of the following is viviparous - 
Select and explain. 
A. Strongyloidis stercoralis, B. Trichinella spiralis, C. Enterobius, D. Ascaris
B: Trichinella spiralis
Answer: B: Trichinella spiralis 
Explanation: 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)