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': 'The cystic form of all are seen in man except - \nSelect and explain. \nA. E. histolytica, B. Giardia, C. Trichomonas, D. Toxoplasma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The trichomonas are flagellate Protozoa with 3 to 5 anterior flagella.These flgellates exist only in the tropozoite phase and there is no cystic phase (refer pgno:33 baveja 3 rd edition)', 'role': 'assistant'}]