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
A diabetic patient developed cellulitis due to Staphylococcus aureus, which was found to be Methicillin resistant on the antibiotic sensitivity testing. All the following antibiotics will be appropriate except: 
Select and explain. 
A. Vancomycin, B. Imipenem, C. Teicoplanin, D. Linezolid
B: Imipenem
Answer: B: Imipenem 
Explanation: None