This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2018, Subject name: Pharmacology
Drug which lacks intrinsic activity against anaerobes is:- 
Select and explain. 
A. Aminoglycosides, B. Beta lactams, C. Chloramphenicol, D. Metronidazole
A: Aminoglycosides
Answer: A: Aminoglycosides 
Explanation: Drug not effective Infection Vancomycin Peudomonas Aminoglycosides Anaerobic infection Aminoglycosides Enteric fever Beta lactams MRSA