The correct option is B Tissue culture
The plants produced from tissue culture are genetically identical to the original plant from which they are grown, so they are called somaclones.
In genetic engineering, the aim is to introduce a new trait to the plant which does not occur naturally in the species.
Plant breeding is the purposeful manipulation of plant species in order to create desired genotypes and phenotypes for specific purposes.
Radiation, as used in genetic engineering, involves producing changes in the hereditary units of existing plants and animals by the use of radiation. The desired results of such irradiation are to increase the quality and/or quantity of such plants or animals.