Several common antibiotics are shown below, and the process blocked by each one is given. 1 rifampicin - blocks RNA polymerase 2 streptomycin - blocks $70\text{S}$ ribosomes 3 neomycin - blocks DNA synthesis 4 ampicillin - blocks peptidoglycan synthesis Which of these antibiotics will influence only the activities of bacterial cells?
- A1, 2, 3 and 4
- B1, 2 and 3 only
- C2 and 4 only
- D4 only