In world, first field release of Bt cotton was in

Answer: Option B

In world, first field release of Bt cotton was in 1996.
Bt cotton is a genetically modified pest-resistant plant cotton variety, which produces an insecticide to combat bollworms.
Bt cotton was first approved for field trials in the United States in 1993 and first approved for commercial use in the United States in 1996.
Bt cotton was approved by the Chinese government in 1997. In 2002, a joint venture between Monsanto and Mahyco introduced Bt cotton to India.