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': 'Simple life cycle requires - \nSelect and explain. \nA. One host, B. Two host, C. Three host, D. Four host', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Human parasite may complete their life cycle in a single host or more than one host.Some parasites require two or three host to complete their life cycle (refer pgno:6 baveja 3 rd edition)', 'role': 'assistant'}]