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': 'Hanging drop method is used for - \nSelect and explain. \nA. T. Trichomonas, B. Plasmodium, C. Toxoplasma, D. Cryptosporidium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: trichomonas vaginalis vaginal or urethral discharge is examined microscopically in a drop of saline for characteristic motile trophoziotes with jerky movements REF:TEXTBOOK OF MEDICAL PARASITOLOGY;BAVEJA;3RD EDITION;PAGE NO 34', 'role': 'assistant'}]