A tumor inducing plasmid widely used in the production of transgenic plants is that of
(a) Escherichia coli
(b) Bacillus thuringiensis
(c) Staphylococcus aureus
(d) Agrobacterium tumefaciens.
(d) T, plasmid is found extragenomically in Agarobacterium tumefaciens which possess T-DNA that is responsible for causing tumour in host plant.