Which of the following statements related to microbes in antibiotics production are correct?A. Penicillin was the first antibiotic discovered by Alexander Fleming while working on the bacterium Staphylococcus.B.  Fleming, Chain and Florey were awarded Nobel Prize in1945.C. The full potential of penicillin as an effective antibiotic was established by Ernest Chain and Howard Florey.D. Penicillin does not allow Penicillium to grow.