The correct answer is (d), Henry Becquerel.
Becquerel was a French physicist who discovered radioactivity in 1896. He was studying the phosphorescence of uranium salts when he noticed that they emitted a strange type of radiation that could pass through paper and even blackened photographic plates. Becquerel’s discovery led to the work of Marie Curie and Pierre Curie, who went on to isolate the elements radium and polonium.
Irene Curie was the daughter of Marie and Pierre Curie. She was also a physicist and made significant contributions to the study of radioactivity.
Rutherford was a New Zealand-born physicist who made important contributions to the study of radioactivity and the structure of the atom. He was awarded the Nobel Prize in Physics in 1908.