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: Medicine
Not useful in clostridium difficile colitis 
Select and explain. 
A. Clindamycin, B. Metronidazole, C. Fidaxomycin, D. Fecal microbiota transplantation
A: Clindamycin
Answer: A: Clindamycin 
Explanation: Clindamycin cause C.difficile colitis.