This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Ova that floats in saturated saline are of: \nSelect and explain. \nA. Unfeilized eggs of Ascaris lumbricoides, B. T. saginata, C. H. Nana, D. N one of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: H. Nana', 'role': 'assistant'}]