This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Which of the following antibiotic acts by inhibiting cell wall synthesis 
Select and explain. 
A. Cefepime, B. Aminoglycoside, C. Erythromycin, D. Doxycycline
A: Cefepime
Answer: A: Cefepime 
Explanation: Ref KDT 6/e p669 Cefepime is a beta lactam antibiotic. It acts by inhibiting cell wall synthesis