The correct option is C Gene therapy
Genetic disorder
Genetic disorder is a disease caused by mutations in the essential gene leading to loss of function of the gene.
Gene therapy
Gene therapy is a process used to replace the defective gene with a correct one. It is used to cure genetic disorders by genetically engineering cells having a defective or mutated gene with a functional gene.
rDNA technology
rDNA technology or recombinant technology is the process of manipulating genetic material such as DNA or RNA to produce recombinant DNA.
This is followed by introduction of recombinant DNA in the host cell and observing the change in phenotype.
Embryo transfer
The zygote or embryo formed in vitro is transferred into the woman’s fallopian tube (zygote intra fallopian transfer) or uterus (intrauterine transfer) respectively for further development of the foetus. This is called embryo transfer. It is a technique to assist an infertile female to have a baby who cannot conceive. This doesn’t help to cure a genetic disorder.
Hybridoma technology
Hybridoma technology is a technique to produce monoclonal antibodies against a particular antigen by fusing immortal myeloma cells with short lived B cells isolated from immunised mice. This doesn’t help to cure a genetic disorder.
Final answer:
(a) Gene therapy