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
Filariform larva is infective in - 
Select and explain. 
A. Enterobius vermicularis, B. Ascaris lumbricoides, C. Necator americanus, D. Trichuris trichura
C: Necator americanus
Answer: C: Necator americanus 
Explanation: Smaller and more slender Spine absent Less pathogenic (refer pgno:147 baveja 3 rd edition)