This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Penicillin & Cephalosporin, Subject name: Pharmacology
Which of the following is not effective against anaerobes - 
Select and explain. 
A. Gentamycin, B. Cefotetan, C. Imipenem, D. Clindamycin
A: Gentamycin
Answer: A: Gentamycin 
Explanation: Arts, is 'a' i.e., Gentamycin Antibiotics that cover the Anaerobes1.Penicillin with Beta lactamase inhibitoro Augment in (Amoxicillin & Clavulanate)o Timentin (Ticaricillin & Clavulanatejo Unasyn (Ampicillin & Sulbactam)o Zosyn (Pipericillin & Tazobactam)2.Second generation Cephalosporinso Cefoxitino Cefotetano Cefmetazole3.Imipenem4.Chloramphenicol5.Clindamycin6.Metronidazole7.TrovafloxacinNote : Aminoglycosides are not active against anaerobes