Correct option is B
The correct answer is: (B) Kerala
In 2018, Kerala achieved the highest literacy rate in India, largely due to its successful literacy programs, including the Athulyam program. This program specifically targeted marginalized groups, helping improve literacy among the elderly and differently-abled individuals, further contributing to the state's already high literacy rate.
As of 2018, Kerala's literacy rate was around 96%, the highest in India, and the state has long been known for its strong educational infrastructure and focus on literacy.