GMO (genetically modified organisms) can be defined as the organisms which have their genetic material altered for the expression of a particular trait.
Golden rice is a genetically modified rice developed to fight malnutrition. It was developed by transferring two beta-carotene biosynthesis genes into the rice genome.
It has increased nutritional value of vitamin A as beta-carotene is a precursor to vitamin A. It has a characteristic yellow colour.
Tracy is the transgenic sheep which produce the human protein, alpha 1-antitrypsin. This has a potential to treat cystic fibrosis and emphysema.
Bt brinjal is a genetically modified crop in which the cry gene of Bacillus thuringiensis is incorporated to make it resistant to certain pests.
Dolly is a cloned sheep created by the introduction of somatic cell nucleus (from the mammary gland of Finn Dorset ewe) into the enucleated egg cell (of Scottish Blackface ewe). It was successfully cloned in 1996 and has the genetic identity with Finn Dorset ewe.
Hence the correct option is
d. Dolly