Which of the following techniques can be used to create diploid homozygous plants in a short span (few months to a year)
This outcome reflects genetic engineering, where vector design and pathway extension enable vitamin production. Option B captures this correctly because it utilizes recombinant DNA and metabolic engineering, consistent with textbook descriptions and experimental observations in biotechnology.
Ref: Primrose and Twyman, Principles of Gene Manipulation and Genomics, 8th Edition, Chapter 2, Recombinant DNA Technology, discusses Golden Rice development, exogenous genes, metabolic engineering and vitamin A pathway extension supporting applications.
