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': 'Filariform larva is infective in - \nSelect and explain. \nA. Enterobius vermicularis, B. Ascaris lumbricoides, C. Necator americanus, D. Trichuris trichura', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Smaller and more slender Spine absent Less pathogenic (refer pgno:147 baveja 3 rd edition)', 'role': 'assistant'}]