A technique of micropropagation is

detailed solution

Correct option is D

Somatic embryogenesis is an artificial process in which a plant or embryo is derived from a callus of  somatic cell. It is a method of micropropagation.Somatic fusion, also called protoplast fusion, is a type of genetic modification in plants by which two distinct species of plant protoplast are fused together to form a new hybrid plant with the characteristics of both, a somatic hybrid.Embryo rescue is one of the earliest and successful forms of in-vitro culture techniques that is used to assist in the development of plant embryos that might not survive to become viable plants.