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': 'Child having perianal pruritus with following eggs is due to - \nSelect and explain. \nA. E.vermicularis, B. Ascaris, C. Ancylostoma duodenale, D. S stercoral is', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., E. vermicularis Clinical features of thread worm Infectionso Most pimvorm infections are asymptomatic.o Perianalpruritis is the cardinal symptom. The itching, is worse at night and disturbes sleep,o Heavy infections can cause abdominal pain and weight loss.", 'role': 'assistant'}]