This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Metrinidazole is least likely to be effective in the treatment of 
Select and explain. 
A. Hepatic amoebiasis, B. Infection caused by bacteroides fragilis, C. Pseudomembranous colitis, D. Pneumocystosis
A: Hepatic amoebiasis
Answer: A: Hepatic amoebiasis 
Explanation: Ref-KDT 6/e p686 Metranidazole is not effective against pneumocyst infection. The DOC for this condition is cotrimoxazole