Which of the following produces the best known bactericidal antibiotic?
Penicillium notatum
P. chrysogenum
The two species of the genus Penicillium notatum and P. Chrysogenum produce the best bactericidal antibiotic, penicillin used for the diseases like pneumonia, tetanus, diptheria etc. The antibiotic penicillin was invented by Flemming, Florae and Chin for which they were awarded the nobel prize in 1945.