On which bacteria was Alexander Fleming working during the discovery of penicillin?

  • A
    Salmonella typhi
  • B
    Staphylococci
  • C
    Haemophilus influenzae
  • D
    Streptococcus pneumoniae

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$S$ (Assertion): Alexander Fleming established the full potential of penicillin as an effective antibiotic.
$R$ (Reason): Alexander Fleming discovered penicillin.

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