Assertion : Agrobacterium tumefaciens is called natural genetic engineer.
Reason : Agrobacterium tumefaciens infects all broad-leaved agricultural crops but does not infect cereal crops.
Answer (b) Both assertion and reason are true but reason is not the correct explanation of assertion.
(b) : Ti plasmid (tumor inducing) from Agrobacterium tumefaciens is effectively used as a vector for gene transfer to plant cells. In nature, it induces tumors in broad leaf crops, e.g., tomato, soybean, cotton, etc.