An elederly male presents with headache, fever and hemiparasis of right side.On further examination and investigation a diagnosis of brain abscess was made.Which of the following antibacterial/antibacterials is effective in this patient -

• A. Gentamycin
• B. Doxycycline
• C. Streptomycin
• D. A combination of Cephalosporin and Metronidazole