This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
Which antibiotic acts by inhibiting cell wall synthesis 
Select and explain. 
A. Cefipime, B. Lomefloxacin, C. Erythromycin, D. Tetracycline
A: Cefipime
Answer: A: Cefipime 
Explanation: Ans. is 'a' i.e. Cefipime