Correct Option: C

To date, four people have won a Nobel Prize twice. Those include: Maria Sklodowska-Curie (1903 and 1911, for discovery of radioactivity (physics) and later for isolating pure radium (chemistry); John Bardeen (1956 and 1972, for invention of the transistor (physics) and for coming up with the theory of superconductivity (physics); Linus Pauling (1954 and 1962, for research into the chemical bond in terms of complex substances (chemistry) and for anti-nuclear activism (peace); and Frederick Sanger (1958 and 1980, for discovering the structure of the insulin molecule (chemistry) and inventing a method to determine base sequences in DNA (chemistry).