Sir Alexander Fleming got Nobel Prix for: (A) Insulin, (B) CT scan, (C) Pencillin, (D) ECG
Answer is C. List of Nobel Laureates

Willem Einthoven : ECG.
Sir Alexander Fleming : Penicillin.
Paul. H. Muller : DDT.
Sir Godfrey N.Hounsfield : Human blood groups.
Karl Landsteiner : Human blood groups.
Paul Ehrlich : Immunity.
Sir Peter Mansfield : MRI.