What is the full form of Bt in Bt cotton?

Correct option is A

Bt stands for Bacillus thuringiensis, a soil bacterium known for its insecticidal properties.
The Cry gene from this bacterium produces proteins toxic to certain insect pests.
Bt cotton contains this gene, providing resistance against bollworms.
Bt technology has revolutionized cotton farming by reducing reliance on chemical pesticides.