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': 'Which worm is longest - \nSelect and explain. \nA. T. solium, B. T. Saginata, C. Hookworm, D. A. Lumbricoides', 'role': 'user'}, {'content': 'Answer: A \nExplanation: two host Man-definitive host Pig -intermediate host Measures 2-3 meters in length (refer pgno:99 baveja 3 rd edition)', 'role': 'assistant'}]