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
Aldehyde test is used for: 
Select and explain. 
A. Fasciola hepatica, B. Leishmania, C. Leishmania, D. Toxocara cams
B: Leishmania
Answer: B: Leishmania 
Explanation: Leishmania