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: Pharmacology
Metrifonate is effective against : 
Select and explain. 
A. Amoebiasis, B. Leishmaniasis, C. Schistosomiasis, D. Giardiasis
C: Schistosomiasis
Answer: C: Schistosomiasis 
Explanation: None