This is the first transgenic crop

The correct option is tobacco.

To understand why tobacco is the correct answer, let us look at the history of genetic engineering in agriculture:

A transgenic crop is a plant that has been genetically modified using recombinant DNA technology to introduce a new trait that does not occur naturally in the species. This is achieved by transferring a specific gene from one organism to another.

In 1983, the first transgenic plant was successfully produced. Scientists created an antibiotic-resistant tobacco plant (Nicotiana tabacum) by transferring a chimeric gene for kanamycin resistance into it using Agrobacterium tumefaciens. This breakthrough laid the foundation for modern agricultural biotechnology and transgenic crop development.

While crops like transgenic cotton (such as Bt cotton), flax, and others were developed later, tobacco holds the distinction of being the very first transgenic crop created in a laboratory setting.