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 antibiotic acts by inhibiting protein synthesis? 
Select and explain. 
A. Cefotetan, B. Doxycycline, C. Ciprofloxacin, D. Oxacillin
B: Doxycycline
Answer: B: Doxycycline 
Explanation: Inhibit protein synthesis: Tetracycline,Chloramphenicol, Erythromycin, Clindamycin, Linezolid. ESSENTIALS OF MEDICAL PHARMACOLOGY page no. 690