The correct option is B A- IV, B- I, C- II
Edward Jenner was an English physician and scientist who was the pioneer of smallpox vaccine, the world's first vaccine. He is often called the father of immunology. Heredity refers to the transfer of biological characteristics from a parent organism to offspring. DNA in the form of large molecules known as chromosomes which is the carrier of genetic instructions for the development and functioning of living organisms. Hydras generally reproduce asexually. They do this through budding.