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
Metronidazole is effective in all of the following conditions except : 
Select and explain. 
A. Pseudomembranous colitis, B. Neurocysticercosis, C. Giardiasis, D. Amebic liver abscess
B: Neurocysticercosis
Answer: B: Neurocysticercosis 
Explanation: None