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 for: 
Select and explain. 
A. Fasciola, B. Leishmania, C. Toxoplasma, D. Toxocara
B: Leishmania
Answer: B: Leishmania 
Explanation: Leishmania