Option 1: Becquerel: Radioactivity

This option is correctly matched. Henri Becquerel was a French physicist who discovered radioactivity in 1896. He conducted experiments with uranium salts and observed that they emitted radiation. This discovery is important in the field of nuclear physics.

Option 2: Alexander Fleming: Penicillin

This option is correctly matched. Alexander Fleming was a Scottish biologist and pharmacologist who discovered the antibiotic substance called penicillin in 1928. His accidental discovery revolutionized the field of medicine and is considered one of the most important discoveries in the history of science.

Option 3: Louis Pasteur: Blood groups

This option is NOT correctly matched. Louis Pasteur was a French biologist and chemist, known for his work on vaccinations, pasteurization, and microbiology. However, he did not discover blood groups. The discovery of blood groups is attributed to Karl Landsteiner, an Austrian biologist and physician, who identified the ABO blood groups in 1901.

Option 4: William Harvey: Blood circulation

This option is correctly matched. William Harvey was an English physician who is famous for his work on the circulatory system. In 1628, he published a book called "De Motu Cordis