The correct option is D Hertwig
Meiosis was first discovered by the German biologist Oscar Hertwig. He described for the first time in sea urchin eggs in 1876. It is also known as reductional division. It mainly occurs in the reproductive cell. It reduces the chromosome number by half, creating four haploid cells, each genetically distinct from the parent cell that gave rise to them. So, the correct answer is option D.