This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology Pa 1 (Protozoology), Subject name: Microbiology
Trichomonas is seen under microscope in? 
Select and explain. 
A. Normal saline, B. Distilled water, C. KOH, D. Dextrose
A: Normal saline
Answer: A: Normal saline 
Explanation: Trichomonas exist only is trophozoite form, so seen in normal saline. Vaginal or urethral discharge is examined microscopically in saline wet mount preparation to look for characteristic jerky & twitching motility & shape.