The correct option is A F.C. Steward and Haberlandt
The potential of the somatic cell to grow and develop into a multicellular and multi-organed organism through the technique of cloning is referred to as cellular totipotency. While German botanist Gottleib Haberlandt introduced the concept of in vitro cell culture, Prof. F.C. Steward of Cornell University worked to show that cellular totipotency is an inherent capability of every single cell. Thus, the correct answer is option A.