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
Larval form in stool is found in -a) Strongyloidesb) Ancylostoma duodenalec) Ascaris lumbricoidesd) Necator americanuse) Trichura 
Select and explain. 
A. acd, B. bcd, C. abd, D. ab
C: abd
Answer: C: abd 
Explanation: Strongyloides is ovo-vivparous, hence larva found in stool.
 If passed feces is allowed to stand for several hours, the Rhabditiform larvae of Ancylostoma duodenale and Necator americanus will hatch out and even they can be seen while performing stool examination.